The RX 6000 series Owners' Club

[Felix123BU]

Did some more RAM testing on my 6800XT, and it seems that for me 2080mhz with fast timings or 2110 with normal timings is the limit before I start getting performance regression.

I guess this is related to the voltage allowed by AMD for the memory and/or controller, that's probably why it is set at max 2150 and does not really go a lot higher. Wonder if its just lower binned memory chips or just a totally stupid random limitation imposed by AMD.

 

[turbogear]

Did some more RAM testing on my 6800XT, and it seems that for me 2080mhz with fast timings or 2110 with normal timings is the limit before I start getting performance regression.

I guess this is related to the voltage allowed by AMD for the memory and/or controller, that's probably why it is set at max 2150 and does not really go a lot higher. Wonder if its just lower binned memory chips or just a totally stupid random limitation imposed by AMD.

Yes, unfortunately memory is limited that is also what I found out with the 3 cards that I tested.
My 6800XT has 2100MHz limit.
The 6900XT Red Devil was limited to 2120MHz.
I had on weekend Sapphire 6900XT Toxic Limited Edition. This was limited to 2110MHz.

I think I am giving up the thoughts to get good performance out of 6900XT after getting second disappointing sample.
Sapphire made big promises for Sapphire 6900XT Toxic Limited Edition as written on Hardwareluxx.
I thought this expensive 1800€ card must have cherry picked chip on it but it was the biggest disappointment.

According to the specs that Hardwareluxx got from Sapphire, they were promising in Toxic boost mode with 2135MHz memory speed and GPU boost up to 2660MHz but the sample I had only reached in the Toxic boost mode 2090MHz for memory and 2590MHz for GPU boost giving only 20200 Time Spy graphic score.
The manual overclock was unstable above 20500 Time Spy Score with max GPU boosting to 2610MHz and maximum VRAM frequency of 2110MHz.

I was able to reach 20900 score on a setting which I though was stable but then I notices on cold boot and start of Time Spy test the PC crashed.
This same thing happen for any setting giving higher than 20500 Time Spy score. There was a crash in Time Spy test if PC was booted and on cold GPU Time Spy test was started.

Really a big disappointment from a Limited Edition of an expensive 6900XT model. The card has been returned.

Sapphire stellt die TOXIC Radeon RX 6900 XT Limited Edition vor - Hardwareluxx

Sapphire stellt die TOXIC Radeon RX 6900 XT Limited Edition vor.

www.hardwareluxx.de

Table of specs pasted on Hardwareluxx:


This is the only photo I made from the card. The box was the size of almost three 6900XT Red Devil boxes.

 

[Gmr_Chick]

Yes, unfortunately memory is limited that is also what I found out with the 3 cards that I tested.
My 6800XT has 2100MHz limit.
The 6900XT Red Devil was limited to 2120MHz.
I had on weekend Sapphire 6900XT Toxic Limited Edition. This was limited to 2110MHz.

I think I am giving up the thoughts to get good performance out of 6900XT after getting second disappointing sample.
Sapphire made big promises for Sapphire 6900XT Toxic Limited Edition as written on Hardwareluxx.
I thought this expensive 1800€ card must have cherry picked chip on it but it was the biggest disappointment.

According to the specs that Hardwareluxx got from Sapphire, they were promising in Toxic boost mode with 2135MHz memory speed and GPU boost up to 2660MHz but the sample I had only reached in the Toxic boost mode 2090MHz for memory and 2590MHz for GPU boost giving only 20200 Time Spy graphic score.
The manual overclock was unstable above 20500 Time Spy Score with max GPU boosting to 2610MHz and maximum VRAM frequency of 2110MHz.

I was able to reach 20900 score on a setting which I though was stable but then I notices on cold boot and start of Time Spy test the PC crashed.
This same thing happen for any setting giving higher than 20500 Time Spy score. There was a crash in Time Spy test if PC was booted and on cold GPU Time Spy test was started.

Really a big disappointment from a Limited Edition of an expensive 6900XT model. The card has been returned.

Sapphire stellt die TOXIC Radeon RX 6900 XT Limited Edition vor - Hardwareluxx

Sapphire stellt die TOXIC Radeon RX 6900 XT Limited Edition vor.

www.hardwareluxx.de

Table of specs pasted on Hardwareluxx:
View attachment 192691

This is the only photo I made from the card. The box was the size of almost three 6900XT Red Devil boxes.

View attachment 192694

No offense but, you DO realize how petty you sound, right? Whining over the fact that you couldn't get a zillion points on a stupid benchmark from not only a 6900XT but a Sapphire Toxic Edition 6900XT! Did you even game on the damn thing before you returned it?

 

[Felix123BU]

Yes, unfortunately memory is limited that is also what I found out with the 3 cards that I tested.
My 6800XT has 2100MHz limit.
The 6900XT Red Devil was limited to 2120MHz.
I had on weekend Sapphire 6900XT Toxic Limited Edition. This was limited to 2110MHz.

I think I am giving up the thoughts to get good performance out of 6900XT after getting second disappointing sample.
Sapphire made big promises for Sapphire 6900XT Toxic Limited Edition as written on Hardwareluxx.
I thought this expensive 1800€ card must have cherry picked chip on it but it was the biggest disappointment.

According to the specs that Hardwareluxx got from Sapphire, they were promising in Toxic boost mode with 2135MHz memory speed and GPU boost up to 2660MHz but the sample I had only reached in the Toxic boost mode 2090MHz for memory and 2590MHz for GPU boost giving only 20200 Time Spy graphic score.
The manual overclock was unstable above 20500 Time Spy Score with max GPU boosting to 2610MHz and maximum VRAM frequency of 2110MHz.

I was able to reach 20900 score on a setting which I though was stable but then I notices on cold boot and start of Time Spy test the PC crashed.
This same thing happen for any setting giving higher than 20500 Time Spy score. There was a crash in Time Spy test if PC was booted and on cold GPU Time Spy test was started.

Really a big disappointment from a Limited Edition of an expensive 6900XT model. The card has been returned.

Sapphire stellt die TOXIC Radeon RX 6900 XT Limited Edition vor - Hardwareluxx

Sapphire stellt die TOXIC Radeon RX 6900 XT Limited Edition vor.

www.hardwareluxx.de

Table of specs pasted on Hardwareluxx:
View attachment 192691

This is the only photo I made from the card. The box was the size of almost three 6900XT Red Devil boxes.

View attachment 192694

Keeping in mind that both the 6800, 6800XT and 6900XT use the same ram chips and as far as I know the same underlying memory system, the memory should have the same performance on all 3, more or less. The only difference is in the number of CU's, and the difference in CU's between the 6800XT and 6900XT is to small to make a significant difference. I don't consider 10% more performance for 350 USD extra worth it, not even close. And I still dream of what these cards could do with much faster ram.

The 6900XT for 1000 USD is from my point of view a cash-grab, nothing more, and nobody can suspect me of hating on AMD, I have had only AMD Gpu's for the past 10 years, not because I am such a fan, but because price-performance-longevity wise they where always the best choice..... and I don't have to use a 1995 control interface

Regarding the Toxic you tested, seem only one thing is toxic about that card, the 1800 EUR price

 

[turbogear]

@Gmr_Chick
Please let's respect each other on the forum. I don't appreciate your use of offensive language.

I am not looking for topping the Benchmark charts. I don't even report the scores online most of the time.
I was expecting to get one of the good overclocking 6900XT like I have seen that there are many samples out there to get higher game performance because I was thinking to move to 4K monitor from the 2K and every percentage of higher FPS will help.
The review for the 6900XT Red Devil Limited Edition from der8auer was really interesting as he could achieve 2700MHz with that.
That's what I thought a limited edition could be able to achieve but it seems it is not the case. The only really thing they promise is higher performance than reference 6900XT which could be only a minor higher than 6800XT.

Seeing that Sapphire should boost up to 2666MHz and VRAM frequency 2135MHz according to the above mentioned spec from HardwareLuxx I thought this would be a good performing card.
The higher benchmark score translates to higher gaming performance.

Of course I tried the Borderland benchmark and Assassin's Creed Valhalla benchmark, but the performance increase over my 6800XT with Toxic was only around 3% while consuming around 50W more.
The 6900XT Red Devil that I tested before gave 5% higher FPS in the above two game benchmarks.

So as Felix123BU mentioned only thing Toxic about Sapphire was the price.
So these two tests I did proves that it is not really worth it to invest higher money in a 6900XT.
Many of the 6800XTs perform really great and come very close to 6900XT in performance.
The performance difference of 10% I think is only if you compare the default setting.
Ones you tune the 6800XT it comes close to a striking distance of 6900XT.
The 6900XT does not scale as high as 6800XT without needing a Nuclear power plant to supply the power to it.


@Felix123BU
I noticed that it is possible to get higher memory clock by increasing the TDC Limit SoC from 55A to 63A.
I saw before that ASUS on it's 6800XT liquid cooled card has the TDC Limit SoC set to 63A.
I can now increase my VRAM frequency from 2100MHz to 2120MHz which translates to higher performance.

Also ASUS is using on the liquid cooled 6800XT TDC Limit GPX of 364A. I have increased mine to 340A from 320A.
I will not go that high as ASUS card as I have reference card which has only 2x8pin and 10phase VRM.
With these tuning my 6800XT can now go to 2715MHz@1010mV.
This gives boost up to 2660MHzs in Time Spy. At the start of GP2 Test the frequency dips toward 2590MHz.
That is the most intensive part of the test.
I let the GP2 test run in loops for longer time to test the stability.
Time Spy graphic test 2 is nasty and if there is any VRAM or GPU frequency instability this test crashes.
I have not tested this setting in games yet. I will do that in the next days by playing AC Valhalla and Cyberpunk.

Here is the current stable setting that I achieved for 6800XT.

 

[Felix123BU]

@Gmr_Chick
Please let's respect each other on the forum. I don't appreciate your use of offensive language.

I am not looking for topping the Benchmark charts. I don't even report the scores online most of the time.
I was expecting to get one of the good overclocking 6900XT like I have seen that there are many samples out there to get higher game performance because I was thinking to move to 4K monitor from the 2K and every percentage of higher FPS will help.
The review for the 6900XT Red Devil Limited Edition from der8auer was really interesting as he could achieve 2700MHz with that.
That's what I thought a limited edition could be able to achieve but it seems it is not the case. The only really thing they promise is higher performance than reference 6900XT which could be only a minor higher than 6800XT.

Seeing that Sapphire should boost up to 2666MHz and VRAM frequency 2135MHz according to the above mentioned spec from HardwareLuxx I thought this would be a good performing card.
The higher benchmark score translates to higher gaming performance.

Of course I tried the Borderland benchmark and Assassin's Creed Valhalla benchmark, but the performance increase over my 6800XT with Toxic was only around 3%.
The 6900XT that I tested before gave 5% higher FPS in the above two game benchmarks.

So as Felix123BU mentioned only thing Toxic about Sapphire was the price.

@Felix123BU
I noticed that it is possible to get higher memory clock by increasing the SoC TDC from 55A to 63A.
I saw before that ASUS on it's 6800XT liquid cooled card has the SoC TDC set to 63A.
I can now increase my VRAM frequency from 2100MHz to 2120MHz which translates to higher performance.

Also ASUS is using on the liquid cooled 6800XT TDC Limit GPX of 364A. I have increased mine to 340A from 320A.
I will not go that high as ASUS card as I have reference card which has only 2x8pin and 10phase VRM.
With these tuning my 6800XT can now go to 2715MHz@1010mV.
This gives boost up to 2660MHzs in Time Spy.

Here is the current stable setting that I achieved for 6800XT.


View attachment 192722 View attachment 192723

View attachment 192725View attachment 192726

One thing I can totally understand is the need for each extra FPS when changing monitors and resolution, had the same "issue" last year, hence the 6800XT
Its funny, I was running 61A TDC Soc, raised it when I first played with MPT, did not help RAM speed really. Its not like I can't run it above 2100, I can, it does not crash, but anything above 2110 gives a regression in performance, its a repeatable experiment in my case.

This is what I get with my daily settings (335 TDC GFX, 285 Power Limit GPU, 61 TDC Soc) (2650Mhz GPU, 2080Mhz memory)

I can get over 20k by pushing it a bit more, but I don't have the need for that Very very happy with how its running now!

I have a question, you say you run your GPU voltage at 1010mv, I noticed on mine that whatever I set it always goes to 1150mv on load. Did you limit your max voltage in MPT?

 

[turbogear]

By the way just to let the community here know, I report a nasty bug with GPU-Z to W1zzard last Friday,
He fixed this and released the new v2.38.0 GPU-Z on the same day.

There was a big issue with GPU-Z and saving of the RDNA2 bioses.
Until v2.38.0, the saved bios size with GPU-Z of the RDNA2 cards (6800,6800XT,6900XT) was only 512kB.
This is wrong. The real bios size of these cards is 1024KB.
So if somebody had attempted to flash the wrong size bios onto their card it will brick it.

W1zzard told me on Friday he will delete all the RDNA2 bios with 512kB size out of the Techpowerup bios database.
So if you go there, you will see that all bioses are gone. Only the ones from reference review samples are there that W1zzard uploaded on Friday.

To help the community here, you can submit your RDNA2 bios to the TPU database through the GPU-Z v2.38.0.

I think W1zzard will appreciate to have the correct bioses in the database again.

TechPowerUp GPU-Z v2.38.0 Released | TechPowerUp Forums

I can get over 20k by pushing it a bit more, but I don't have the need for that Very very happy with how its running now!

I have a question, you say you run your GPU voltage at 1010mv, I noticed on mine that whatever I set it always goes to 1150mv on load. Did you limit your max voltage in MPT?

1010mV is just the setting in Radeon. It is not the real voltage that the GPU uses.
The real voltage goes to 1150mV in my case also.
But what I noticed is that the lower you can set this setting in Radeon the higher performance you can achieve with the same power limit.
If I have for example 1030mV instead of 1010mV in the Radeon setting the card boost to lower frequencies. It hits the target 1150mV for lower frequency.

Regarding the VRAM frequency, I had also regression before if I set to anything higher than 2100MHz.
Now after I increased TDC SoC to 63A, I can go to 2120MHz without regression. Now regression starts around 2124MHz for me. So I leave it 4MHz below that.

 

[Butanding1987]

By the way just to let the community here know, I report a nasty bug with GPU-Z to W1zzard last Friday,
He fixed this and released the new v2.38.0 GPU-Z on the same day.

There was a big issue with GPU-Z and saving of the RDNA2 bioses.
Until v2.38.0, the saved bios size with GPU-Z of the RDNA2 cards (6800,6800XT,6900XT) was only 512kB.
This is wrong. The real bios size of these cards is 1024KB.
So if somebody had attempted to flash the wrong size bios onto their card it will brick it.

W1zzard told me on Friday he will delete all the RDNA2 bios with 512kB size out of the Techpowerup bios database.
So if you go there, you will see that all bioses are gone. Only the ones from reference review samples are there that W1zzard uploaded on Friday.

To help the community here, you can submit your RDNA2 bios to the TPU database through the GPU-Z v2.38.0.

I think W1zzard will appreciate to have the correct bioses in the database again.

TechPowerUp GPU-Z v2.38.0 Released | TechPowerUp Forums


1010mV is just the setting in Radeon. It is not the real voltage that the GPU uses.
The real voltage goes to 1150mV in my case also.
But what I noticed is that the lower you can set this setting in Radeon the higher performance you can achieve with the same power limit.
If I have for example 1030mV instead of 1010mV in the Radeon setting the card boost to lower frequencies. It hits the target 1150mV for lower frequency.

Regarding the VRAM frequency, I had also regression before if I set to anything higher than 2100MHz.
Now after I increased TDC SoC to 63A, I can go to 2120MHz without regression. Now regression starts around 2124MHz for me. So I leave it 4MHz below that.

Submitted my Nitro+ Performance BIOS.

@Gmr_Chick
Please let's respect each other on the forum. I don't appreciate your use of offensive language.

I am not looking for topping the Benchmark charts. I don't even report the scores online most of the time.
I was expecting to get one of the good overclocking 6900XT like I have seen that there are many samples out there to get higher game performance because I was thinking to move to 4K monitor from the 2K and every percentage of higher FPS will help.
The review for the 6900XT Red Devil Limited Edition from der8auer was really interesting as he could achieve 2700MHz with that.
That's what I thought a limited edition could be able to achieve but it seems it is not the case. The only really thing they promise is higher performance than reference 6900XT which could be only a minor higher than 6800XT.

Seeing that Sapphire should boost up to 2666MHz and VRAM frequency 2135MHz according to the above mentioned spec from HardwareLuxx I thought this would be a good performing card.
The higher benchmark score translates to higher gaming performance.

Of course I tried the Borderland benchmark and Assassin's Creed Valhalla benchmark, but the performance increase over my 6800XT with Toxic was only around 3% while consuming around 50W more.
The 6900XT Red Devil that I tested before gave 5% higher FPS in the above two game benchmarks.

So as Felix123BU mentioned only thing Toxic about Sapphire was the price.
So these two tests I did proves that it is not really worth it to invest higher money in a 6900XT.
Many of the 6800XTs perform really great and come very close to 6900XT in performance.
The performance difference of 10% I think is only if you compare the default setting.
Ones you tune the 6800XT it comes close to a striking distance of 6900XT.
The 6900XT does not scale as high as 6800XT without needing a Nuclear power plant to supply the power to it.


@Felix123BU
I noticed that it is possible to get higher memory clock by increasing the TDC Limit SoC from 55A to 63A.
I saw before that ASUS on it's 6800XT liquid cooled card has the TDC Limit SoC set to 63A.
I can now increase my VRAM frequency from 2100MHz to 2120MHz which translates to higher performance.

Also ASUS is using on the liquid cooled 6800XT TDC Limit GPX of 364A. I have increased mine to 340A from 320A.
I will not go that high as ASUS card as I have reference card which has only 2x8pin and 10phase VRM.
With these tuning my 6800XT can now go to 2715MHz@1010mV.
This gives boost up to 2660MHzs in Time Spy. At the start of GP2 Test the frequency dips toward 2590MHz.
That is the most intensive part of the test.
I let the GP2 test run in loops for longer time to test the stability.
Time Spy graphic test 2 is nasty and if there is any VRAM or GPU frequency instability this test crashes.
I have not tested this setting in games yet. I will do that in the next days by playing AC Valhalla and Cyberpunk.

Here is the current stable setting that I achieved for 6800XT.


View attachment 192722 View attachment 192723

View attachment 192725View attachment 192726

Can you write a short instruction on how to flash the BIOS using MPT? I read the write-up on Igor's Lab's website and the writing style is kind of difficult to understand. Which flash tool did you use to save your default BIOS and how do you save a new one with the power change? Thanks.

 

[Athlonite]

@turbogear you do realize that the cards that reviewers are given are usually cherry picked for just that sort of thing right benching in reviews to make their GPU look the best everything sold to consumers is a 1 in 100 chance of getting a great clocker if your lucky

 

[turbogear]

@turbogear you do realize that the cards that reviewers are given are usually cherry picked for just that sort of thing right benching in reviews to make their GPU look the best everything sold to consumers is a 1 in 100 chance of getting a great clocker if your lucky

Yes, but I thought when they release Limited Edition version of a card with only few 100/1000 samples produced then they will cherry pick these SoC to get good performance to show off their brand name with the limited edition.

One thing I have to add was that they did good job with the cooling.
The Junction temperatures on the Limited edition were all time below 75°C with fan set to 80% and lot of power being pushed into it (370W core power and 368A core TDC set with MPT).
I did not find the fans that loud and the pump for me was also silent.
Igor also did the review for this. He complained all the time about the noisy Asetek pump.
His pump was noisy but his sample had a better performance than mine.

Toxic boost is also a nice feature. It extracts close to maximum from the card already by just pressing of a button in the Trixx software.
As I also read on only two reviews I can find, is that it is really not possible to get much higher performance than what the Toxic boost offers.
My sample was underperforming there compared to the reviewed cards.
I tried to push it manually but my sample gave with Toxic Boost a Time Spy Score of 20200 and maximum stable manual OC was 20500.

Submitted my Nitro+ Performance BIOS.



Can you write a short instruction on how to flash the BIOS using MPT? I read the write-up on Igor's Lab's website and the writing style is kind of difficult to understand. Which flash tool did you use to save your default BIOS and how do you save a new one with the power change? Thanks.
View attachment 192785

As far as I know it is not possible to flash the bios with Red Bios Editor at the moment.
There is another tool that can be used to flash it, but why you want to flash the bios?

There is a huge risk to brick the card and you cannot at the moment change limits like voltage or frequency of the card anyways.
There is a huge discussion on-going at Igor's Lab forum about it but there is no real solution at the moment to change such limits with RBE.

For adjusting power limits you don't have to flash the bios. You can do such changes with MPT.

In any case, here you can find the tool (ATITool v3.15) which can be used to flash the bios.
Use it under your own risk:

RDNA2 RX6000 Series Owners Thread, Tests, Mods, BIOS & Tweaks !

Well.... or just wait a year and buy my used 6900xt for a good price ;):D I was thinking 6700xt 12gb 400-500$ in march...one can hope. :)

forums.guru3d.com

The only thing I use the BIOSes from other 6800XT for is if I want to load setting into MPT from another 6800XT variant.
All the BIOSes are the same expect for changes to Fan Profile, Power limit GPU (W), TDC Limit GPX (A) as well as TDC limit SoC (A).
For taking over these setting from another card I don't need to flash the bios but only load other BIOS into the MPT and apply the setting from there.

 

[Butanding1987]

Yes, but I thought when they release Limited Edition version of a card with only few 100/1000 samples produced then they will cherry pick these SoC to get good performance to show off their brand name with the limited edition.

One thing I have to add was that they did good job with the cooling.
The Junction temperatures on the Limited edition were all time below 75°C with fan set to 80% and lot of power being pushed into it (370W core power and 368A core TDC set with MPT).
I did not find the fans that loud and the pump for me was also silent.
Igor also did the review for this. He complained all the time about the noisy Asetek pump.
His pump was noisy but his sample had a better performance than mine.

Toxic boost is also a nice feature. It extracts close to maximum from the card already by just pressing of a button in the Trixx software.
As I also read on only two reviews I can find, is that it is really not possible to get much higher performance than what the Toxic boost offers.
My sample was underperforming there compared to the reviewed cards.
I tried to push it manually but my sample gave with Toxic Boost a Time Spy Score of 20200 and maximum stable manual OC was 20500.


View attachment 192791


As far as I know it is not possible to flash the bios with Red Bios Editor at the moment.
There is another tool that can be used to flash it, but why you want to flash the bios?

There is a huge risk to brick the card and you cannot at the moment change limits like voltage or frequency of the card anyways.
There is a huge discussion on-going at Igor's Lab forum about it but there is no real solution at the moment to change such limits with RBE.

For adjusting power limits you don't have to flash the bios. You can do such changes with MPT.

In any case, here you can find the tool (ATITool v3.15) which can be used to flash the bios.
Use it under your own risk:

RDNA2 RX6000 Series Owners Thread, Tests, Mods, BIOS & Tweaks !

Well.... or just wait a year and buy my used 6900xt for a good price ;):D I was thinking 6700xt 12gb 400-500$ in march...one can hope. :)

forums.guru3d.com

The only thing I use the BIOSes from other 6800XT for is if I want to load setting into MPT from another 6800XT variant.
All the BIOSes are the same expect for changes to Fan Profile, Power limit GPU (W), TDC Limit GPX (A) as well as TDC limit SoC (A).
For taking over these setting from another card I don't need to flash the bios but only load other BIOS into the MPT and apply the setting from there.

I thought you have to flash the bios to be able to apply the new power limits. How do you force Wattman to recognize the new settings? Thanks.

 

[turbogear]

I thought you have to flash the bios to be able to apply the new power limits. How do you force Wattman to recognize the new settings? Thanks.

For that you only need the MorePowerTool (MPT).
This does not flash the bios.
It only uses the bios to write setting into Radeon Software SPPT (Soft Power Play Tables).
These are tables in the Radeon Software. So every time you do a driver update, you need to apply these settings again as these setting are then lost.

You need a copy of a Bios file and then you load it into the MPT tool by using the load button.
You can save your own bios by GPU-Z locally and then load it into MPT to see the default setting.

After that you can go to the Power and Voltage tab and change the settings marked in yellow in screen shot below as you need them.
After you are finished with editing the setting, just press Write SPPT and then reboot the computer.
You need to reboot for the setting to be applied.

Please note, that you should not try to increase the voltage range and frequency range. These are hard locked by Radeon Driver.
If you change these settings, after reboot your card will go to Safe Mode and the frequency will be stuck at 500MHz.
In that case you need to restore the default setting by loading the bios again into MPT and applying the settings and rebooting.

You can decrease the voltage but you cannot increase it at the moment.
Maybe in future Igor's Lab community which created this MPT tool may find a workaround for that but it does not work until now.

Here you can find a guide how to use this utility:

The complete Big Navi UV Guide: Undervolting and power saving with the MorePowerTool simply explained | Practice | igor´sLAB

New year, new luck! Due to various inquiries and great interest in the topic, I have put together a detailed UV guide for you here, since I had a small craft project pending anyway.

www.igorslab.de

 

[Felix123BU]

@turbogear you do realize that the cards that reviewers are given are usually cherry picked for just that sort of thing right benching in reviews to make their GPU look the best everything sold to consumers is a 1 in 100 chance of getting a great clocker if your lucky

Generally speaking you are correct, but for the 6000 series I have yet to see a review of a card that has the performance mine has, or the scores present on this thread. That's probably because they are ran very conservatively at stock, and no review really bothered to overclock it seriously. That being said, I think you can "forgive" some of us that hope they can get a better than average binned chip, since the average seems quite high with these cards

By the way just to let the community here know, I report a nasty bug with GPU-Z to W1zzard last Friday,
He fixed this and released the new v2.38.0 GPU-Z on the same day.

There was a big issue with GPU-Z and saving of the RDNA2 bioses.
Until v2.38.0, the saved bios size with GPU-Z of the RDNA2 cards (6800,6800XT,6900XT) was only 512kB.
This is wrong. The real bios size of these cards is 1024KB.
So if somebody had attempted to flash the wrong size bios onto their card it will brick it.

W1zzard told me on Friday he will delete all the RDNA2 bios with 512kB size out of the Techpowerup bios database.
So if you go there, you will see that all bioses are gone. Only the ones from reference review samples are there that W1zzard uploaded on Friday.

To help the community here, you can submit your RDNA2 bios to the TPU database through the GPU-Z v2.38.0.

I think W1zzard will appreciate to have the correct bioses in the database again.

TechPowerUp GPU-Z v2.38.0 Released | TechPowerUp Forums


1010mV is just the setting in Radeon. It is not the real voltage that the GPU uses.
The real voltage goes to 1150mV in my case also.
But what I noticed is that the lower you can set this setting in Radeon the higher performance you can achieve with the same power limit.
If I have for example 1030mV instead of 1010mV in the Radeon setting the card boost to lower frequencies. It hits the target 1150mV for lower frequency.

Regarding the VRAM frequency, I had also regression before if I set to anything higher than 2100MHz.
Now after I increased TDC SoC to 63A, I can go to 2120MHz without regression. Now regression starts around 2124MHz for me. So I leave it 4MHz below that.

Its funny, I ran the SOC TDC at 61A, raised it for kicks to 63A, and yup, can run it 20Mhz higher
Simple man's math would say each amp extra equates to 10Mhz more, might test it out, though doubt it will work, the SOC TDC readings are well below 63A even when memory is fully loaded, so that should not be a bottleneck.
Without being able to change memory voltage there wont be any magical jumps.

AMD, IF ANY OF YOU CAN READ THIS, UNLOCK THE 6000 SERIES!!!!!

 

[turbogear]

Generally speaking you are correct, but for the 6000 series I have yet to see a review of a card that has the performance mine has, or the scores present on this thread. That's probably because they are ran very conservatively at stock, and no review really bothered to overclock it seriously. That being said, I think you can "forgive" some of us that hope they can get a better than average binned chip, since the average seems quite high with these cards


Its funny, I ran the SOC TDC at 61A, raised it for kicks to 63A, and yup, can run it 20Mhz higher
Simple man's math would say each amp extra equates to 10Mhz more, might test it out, though doubt it will work, the SOC TDC readings are well below 63A even when memory is fully loaded, so that should not be a bottleneck.
Without being able to change memory voltage there wont be any magical jumps.

AMD, IF ANY OF YOU CAN READ THIS, UNLOCK THE 6000 SERIES!!!!!

Man we are geniuses.
Good that my discovery also worked for you.

The memory needs voltage unlock to tune it further. We need bios moding.

I was doing some brainstorming yesterday and thinking about how the DDR is usually interfaced to SoC so I thought why not try to raise SoC TDC target and try if it can help with GDDR frequency. It helped for me and I shared this with you.

Now my important question is how high this values can be allowed to increase to reach 2150MHz.
63A was the value that ASUS uses for 6800XT Strix LC so I thought they will not use an unsafe value.

As you mentioned this generation of GPU from AMD are great performers and lot of cards out there are really great for tuning.

Unlike some average users who buy their GPU and put it into PC, install drivers and go to games, many of us here in forum love our hardware and have in addition to gaming a hobby of tuning our system to get best possible performance out of it.

As you also said most of the reviews in the internet did not bother much with tuning these GPUs when they did reviews.
What they tried was very simple overclock just by raising power limit and shifting frequency bar higher without trying to tune voltage or play around with tools like MPT, etc.

 

[Felix123BU]

Man we are geniuses.
Good that my discovery also worked for you.

The memory needs voltage unlock to tune it further. We need bios moding.

I was doing some brainstorming yesterday and thinking about how the DDR is usually interfaced to SoC so I thought why not try to raise SoC TDC target and try if it can help with GDDR frequency. It helped for me and I shared this with you.

Now my important question is how high this values can be allowed to increase to reach 2150MHz.
63A was the value that ASUS uses for 6800XT Strix LC so I thought they will not use an unsafe value.

As you mentioned this generation of GPU from AMD are great performers and lot of cards out there are really great for tuning.

Unlike some average users who buy their GPU and put it into PC, install drivers and go to games, many of us here in forum love our hardware and have in addition to gaming a hobby of tuning our system to get best possible performance out of it.

As you also said most of the reviews in the internet did not bother much with tuning these GPUs when they did reviews.
What they tried was very simple overclock just by raising power limit and shifting frequency bar higher without trying to tune voltage or play around with tools like MPT, etc.

agree with all you said, hence, I will say it again:

AMD, IF YOU SEE THIS, FREE THE 6000 SERIES!!!

 

[Butanding1987]

@Gmr_Chick
Also ASUS is using on the liquid cooled 6800XT TDC Limit GPX of 364A. I have increased mine to 340A from 320A.
I will not go that high as ASUS card as I have reference card which has only 2x8pin and 10phase VRM.

I think the AMD reference cards use a 12-phase GPU VRM design. So maybe you should push it further.

 

[turbogear]

I think the AMD reference cards use a 12-phase GPU VRM design. So maybe you should push it further.

Well yes it could be pushed further, but it is only 10-phases for Vcore on reference 6800XT card and not 12.
In total there are 15- phases; 10 for Vcore, 2 for SoC and 3 for VRAM.

In any case each phase theoretically can deliver 70A. So total of around 700A, but I am not sure how high one can push it without needing lot of cooling for VRM.
We are also not sure how many amperes the PCB is designed to handle. Pushing it too high on regular bases could cause damage to the PCB.
That would not be problem if one is just pushing it for short time to run some benchmarks.

In any way, I did also some research for PSU cables also. If one has 18AWG high quality cable then it is possible to push up to 8Ax3×12V=288W per 8pin cable. There are 3 power carrying lines in 8pin cable. In 6pin there are only 2.

So if one uses two separate cables from PSU to GPU, it should be possible to get up to 570W on them, but I personally would not like to push more than 450W over cable.
More current causes the cable to get hot and voltage drop on them increases.

 

[goosegoose]

I'm not sure what I'm doing wrong. I'm getting bad scores even with an overclock. Test.

Is it my CPU or my motherboard? I'm using a 3900x with a slight undervolt and a Gigabyte GA-AX370 Gaming k5.

 

[Athlonite]

@goosegoose that looks like your mobo is the bottleneck

 

[goosegoose]

@goosegoose that looks like your mobo is the bottleneck

Could it have to do with PCIE 3.0 vs 4.0?

 

[turbogear]

Could it have to do with PCIE 3.0 vs 4.0?

Also try not to push VRAM that far.
On many RDNA2 cards the score actually drops if memory is pushed that far.
Mine does not like much higher than 2100MHz.
It can go to 2120MHz if I push SoC TDC to 63A with MPT. Default is 55A.

 

[goosegoose]

Also try not to push VRAM that far.
On many RDNA2 cards the score actually drops if memory is pushed that far.
Mine does not like much higher than 2100MHz.
It can go to 2120MHz if I push SoC TDC to 63A with MPT. Default is 55A.

Hmm. I'll try that out.

 

[GamerGuy]

Just curious, anyone here got their mitts on the RX 6700 XT, or at the very least, have successfully ordered one?

 

[Felix123BU]

I'm not sure what I'm doing wrong. I'm getting bad scores even with an overclock. Test.

Is it my CPU or my motherboard? I'm using a 3900x with a slight undervolt and a Gigabyte GA-AX370 Gaming k5.

View attachment 192908View attachment 192909

I think I know why your scores are lower than some here, its the 3900X. Had basically the same thing happening while I was on a 3800X, the jump to a 5800X changed things considerably.
I would not say the experience with the 6800XT was bad paired with the 3800X, but its on a different level with the 5800X. I can literally feel games being a lot smoother with the 5800X combined with my 6800XT.

What I can not do is test it again with the 3800X which went to my wife, the 6800XT is in a water loop and changing back to the stock cooler is not an option.

From memory the best Time Spy score I got with the 3800X was 17800-ish, but that was with system RAM tuned heavily aswell, that also helps a lot.
If getting a Ryzen 5000 series CPU is not an option, I would not really bother with the Time Spy score, those are more for show, I would see how actual gaming is. If you are satisfied with how you can game on it, I would really not bother with a CPU upgrade, or Time Spy scores

And also, what @turbogear said, memory should not be pushed past 2100mhz, over 2100mhz there are good chances it will reduce performance, in Time Spy and actual games too. I would start memory OC at 2050 and go up in increments of 10 until I get another score reduction.

 

[goosegoose]

I think I know why your scores are lower than some here, its the 3900X. Had basically the same thing happening while I was on a 3800X, the jump to a 5800X changed things considerably.
I would not say the experience with the 6800XT was bad paired with the 3800X, but its on a different level with the 5800X. I can literally feel games being a lot smoother with the 5800X combined with my 6800XT.

What I can not do is test it again with the 3800X which went to my wife, the 6800XT is in a water loop and changing back to the stock cooler is not an option.

From memory the best Time Spy score I got with the 3800X was 17800-ish, but that was with system RAM tuned heavily aswell, that also helps a lot.
If getting a Ryzen 5000 series CPU is not an option, I would not really bother with the Time Spy score, those are more for show, I would see how actual gaming is. If you are satisfied with how you can game on it, I would really not bother with a CPU upgrade, or Time Spy scores

And also, what @turbogear said, memory should not be pushed past 2100mhz, over 2100mhz there are good chances it will reduce performance, in Time Spy and actual games too. I would start memory OC at 2050 and go up in increments of 10 until I get another score reduction.

Thanks a lot! That's the best info I've heard yet.