The RX 6000 series Owners' Club

[turbogear]

Now it makes me think if your 6900XT was lower quality or if this situation applies to all 6900XT Red Devils. Considering that I have exact one you sir made me worried I won't be able to pull of some decent OC. If I change my PSU that is. The 750W I got now makes me think it is definitely not enough for a long term OC. I really hope you are wrong with the 6900xt Red Devil and it was your card's misfortune in OC only.
problem is, it is hard to get any decent PSu at the moment and if I could get one the prices are astronomical. The other one is, my CPU can't keep up with the card while benching at 1080p. I would need to get some 4k bench that would utilize GPU fully and give the CPU a heave ho. Otherwise the score will be a total hokum not anything representative.

Well my Red Devil was not the best.
There are some out there which are better than mine, but still as far as I read the undervolt range is not that high as 6800XT.
Some users of Red Devil 6900XT have a thread going at Igor's Lab. It is a German thread though.
Here is the link to that thread.

AMD - PowerColor Radeon RX 6900 XT Red Devil

Hallo in die Runde! Nachdem ich mir jetzt eine RX 6900 XT gegönnt habe und regelmäßig Igor´s Videos schaue, habe ich jetzt auch versucht meine Grafikkarte "zu prügeln"! Als absoluter OC Anfänger habe ich versucht mich vorsichtig so wie ich glaube es in den Videos verstanden zu haben nach vorne...

www.igorslab.de

1040-1060mV voltage range is possible with Red Devil, but as you will also see there you need to increase the power target a lot to get good performance.
You will see there people use in range of 400W on the GPU Core only (Total GPU power of ~450W) and 384A TDC to achieve Time Spy score in range of 20800.
My sample was not able to go much higher than 20600 on Time Spy score though I tried 400W and 384A TDC.

Because my 6800XT can achieve up to 20K Time Spy score, for me it did not make sense to replace 6800XT with 6900XT for only 4-5% maximum performance gain because the power consumption is much higher to achieve this.

You will need a good PSU if you want to push the Red Devil, as said the power target need to be increased from 281W default to around 400W on core to achieve high performance.
I have a 1200W PSU so for me that was not a problem.

 

[ratirt]

1040-1060mV voltage range is possible with Red Devil, but as you will also see there you need to increase the power target a lot to get good performance.
You will see there people use in range of 400W on the GPU Core only (Total GPU power of ~450W) and 384A TDC to achieve Time Spy score in range of 20800.
My sample was not able to go much higher than 20600 on Time Spy score though I tried 400W and 384A TDC.

Because my 6800XT can achieve up to 20K Time Spy score, for me it did not make sense to replace 6800XT with 6900XT for only 4-5% maximum performance gain because the power consumption is much higher to achieve this.

You will need a good PSU if you want to push the Red Devil, as said the power target need to be increased from 281W default to around 400W on core to achieve high performance.
I have a 1200W PSU so for me that was not a problem.

I got mine set to 1000mv and it was working as intended but no OC or maybe slight OC I'm not quite sure now since I haven't played with it for a while now.
400W that's a lot an a killer to my PSU. I would need to look for a better PSU until then, I give the OC no go and focus on undervolting.
I know the 6800XT is a great overclocker and 6900XT's price and performance sucks but I got this one so I'm stuck with it. It's not a bad card anyway and there's still headroom for OC. Maybe small but still is.

 

[turbogear]

I got mine set to 1000mv and it was working as intended but no OC or maybe slight OC I'm not quite sure now since I haven't played with it for a while now.
400W that's a lot an a killer to my PSU. I would need to look for a better PSU until then, I give the OC no go and focus on undervolting.
I know the 6800XT is a great overclocker and 6900XT's price and performance sucks but I got this one so I'm stuck with it. It's not a bad card anyway and there's still headroom for OC. Maybe small but still is.

If you can undervolt it to 1000mV that is a good indication that hopefully you have one of those really great cards.
Not many 6900XT are stable that low. Many cannot even go lower than 1100mV. Mine was instable below 1050mV.

The lower the voltage that you can set the less power it will need to have a reasonable OC headroom.
You can try in the Radeon Setting auto overclock.
This will set automatically a frequency and gives good indication how high you can overclock.

With my Red Devil Auto overclock set frequency to 2580MHz and I was able to achieve 2675MHz.
If Radeon gives you similar value that would indicate that most probably you could go in range of 2700MHz or even higher.
The 1000mV will help you to get the high performances without going crazy on the power consumption.

 

[ChristTheGreat]

Sony porting games to PC doesn't mean those games will favor RDNA2 though. FF XV, Monster Hunter: World, Death Stranding, Nioh 2 are supporting DLSS and you will see more ported games supporting DLSS coming out. Well maybe you don't give a crap about DLSS either

Well, maybe we don't know. If dev port game correctly, it could take advantage.

DLSS, no I don't care. I play 1080p high frames, and won't change until a long time.

AMD has fidelityfx, which works on a couple of Games also.

Anyway, I thought my return to nVidia would be nice, and I was quite dissapointed so any nVidia tech, I dont care right now

 

[Butanding1987]

By the way what settings are you using on you 6800XT for the OC?
Your Portal Royal results are a little better but Time Spy a little less than mine.

My settings, 2675MHz@985mV with MPT set to 275W, 310A TDC and additionally 15% power limit in Radeon Software. My VRAM though can only operate stable at 2100MHz with fast timing. The VRAM does not like higher frequencies on my sample.
Here are my results in details:

The RX 6000 series Owners' Club

New poster, and proud owner of a new 6800XT! Just up picked a Power Color Reference model last week. Had to pay £100 over the MSRP to secure it but well worth it in the end once I got it home, put it under water and started running some benchmarks. I bought myself an EK Quantum-Vector Water...

www.techpowerup.com

I increased 5mV to the setting posted in the link to get higher score in Port Royal Stress Test from 99.3% to 99.7%.

I got Time Spy score in your range before when I had lower setting of 2650MHz@970mV as posted in the link above.

I don't remember the settings for that Port Royal result. I've been unable to reproduce it. The most I can get now is 10,156 to 10,178 using the settings below. I usually get higher scores upon booting in the morning. I also find that I can usually get away with a higher GPU and memory clock by undervolting instead of increasing the voltage.

As a side note, my GPU and junction temperatures reached as high as 90 C and 113 C, respectively when running Port Royal using the built-in fans. With a custom loop, the maximum temperatures are now in the 50s and 60s, respectively. Maybe 72 C tops when looping.

 

[Athlonite]

Well, at this point, I'd take a Sapphire Nitro 5700XT and be perfectly happy with it. Shit, I might even be able to run Battlefront II in DX12 properly with it. I tried with my 1660 Super and...yeah, it failed badly, lol.

I'd offer to buy you an RX6800 non XT here but shipping to you would kill any savings you'd make just buying one where you live
Powercolor PowerColor Red Dragon Radeon RX 6800 - Graphics card 16GB G $1,224.66 ( $858.24USD) + $???.?? shipping and don't forget Duty

 

[kapone32]

Sony porting games to PC doesn't mean those games will favor RDNA2 though. FF XV, Monster Hunter: World, Death Stranding, Nioh 2 are supporting DLSS and you will see more ported games supporting DLSS coming out. Well maybe you don't give a crap about DLSS either

Yeah because the PS has been using Intel parts for years. DLSS really. My TV provider uses a a form of DLSS to have their 540P output to use AI to upscale to 1080P on your TV. A game changer indeed.

 

[Felix123BU]

I am still of the opinion that DLSS is a pure gimmick and marketing feature. I just can not see Nvidia making DLSS what it should be, as in be in almost all games, that would make it something else than a gimmick.

Why would they do that? So that a 3050 can have the same experience as a 3080? So you would not need to buy a 3080 if a supposed 3050 can have the same experience? In what universe would Nvidia want that?

One thing I will always praise though is Nvidia's marketing, its sooo good, they managed to make DLSS look like the holy grail and all are buying into it and almost all are forgetting it was just done to hide the crappy Raytracing performance, not because Nvidia is your friend. And AMD is playing the game aswell, just as usual late to the party, and with horrendous naming, Fidelity FX Super Resolution, come on, really nothing better came up for this?

 

[nguyen]

Yeah because the PS has been using Intel parts for years. DLSS really. My TV provider uses a a form of DLSS to have their 540P output to use AI to upscale to 1080P on your TV. A game changer indeed.

Well if you think AI upscaling a video games where users make inputs that create different outcomes vs upscaling a movie is the same then yeah

 

[Butanding1987]

I am still of the opinion that DLSS is a pure gimmick and marketing feature. I just can not see Nvidia making DLSS what it should be, as in be in almost all games, that would make it something else than a gimmick.

Why would they do that? So that a 3050 can have the same experience as a 3080? So you would not need to buy a 3080 if a supposed 3050 can have the same experience? In what universe would Nvidia want that?

One thing I will always praise though is Nvidia's marketing, its sooo good, they managed to make DLSS look like the holy grail and all are buying into it and almost all are forgetting it was just done to hide the crappy Raytracing performance, not because Nvidia is your friend. And AMD is playing the game aswell, just as usual late to the party, and with horrendous naming, Fidelity FX Super Resolution, come on, really nothing better came up for this?

RedGamingTech over on YouTube claims Super Resolution will double the performance and is backward compatible with 5000 series cards.

 

[kapone32]

I am still of the opinion that DLSS is a pure gimmick and marketing feature. I just can not see Nvidia making DLSS what it should be, as in be in almost all games, that would make it something else than a gimmick.

Why would they do that? So that a 3050 can have the same experience as a 3080? So you would not need to buy a 3080 if a supposed 3050 can have the same experience? In what universe would Nvidia want that?

One thing I will always praise though is Nvidia's marketing, its sooo good, they managed to make DLSS look like the holy grail and all are buying into it and almost all are forgetting it was just done to hide the crappy Raytracing performance, not because Nvidia is your friend. And AMD is playing the game aswell, just as usual late to the party, and with horrendous naming, Fidelity FX Super Resolution, come on, really nothing better came up for this?

I know exactly what you mean the should have called it FreelSS

Well if you think AI upscaling a video games where users make inputs that create different outcomes vs upscaling a movie is the same then yeah

It doesn't matter I have no intention of doing what turning down my settings would do anyway. but since this is a 6800XT owner's thread why are you as an owner of a 3090 creeping on our Garden?

 

[turbogear]

I don't remember the settings for that Port Royal result. I've been unable to reproduce it. The most I can get now is 10,156 to 10,178 using the settings below. I usually get higher scores upon booting in the morning. I also find that I can usually get away with a higher GPU and memory clock by undervolting instead of increasing the voltage.

As a side note, my GPU and junction temperatures reached as high as 90 C and 113 C, respectively when running Port Royal using the built-in fans. With a custom loop, the maximum temperatures are now in the 50s and 60s, respectively. Maybe 72 C tops when looping.

Your settings are very similar to mine but less performance than mine can be explained due to the fact that you need 1010mV and mine works as low as 985mV.
As you have Sapphire Nitro+, this means the power target is already set to 289W by default so you did not need MPT but you could consider increasing TDC a little to get more performance.

Therefore you only need to undervolt your GPU to get higher performance.

I have reference design with power target set to 255W by default and I use additionally MPT to set the GPU Core power target to 275W and 310A TDC in addition to the settings in Radeon Software.

According the bios info page from TPU, the Nitro+ has 289W core and TDC at 300A. I would have tried to increase it a little like for example 310A and it could give you little bit more performance.

Sapphire RX 6800 XT VBIOS

16 GB GDDR6, 500 MHz GPU, 2000 MHz Memory

www.techpowerup.com

You also mentioned that you get better performance when you turn on the computer. That is a little strange with water cooler. I had this before with original cooler as after a few runs temperatures where higher and performance then dropped but I don't notice something like that since I have water cooler.

 

[Butanding1987]

Your settings are very similar to mine but less performance than mine can be explained due to the fact that you need 1010mV and mine works as low as 985mV.
As you have Sapphire Nitro+, this means the power target is already set to 289W by default so you did not need MPT but you could consider increasing TDC a little to get more performance.

Therefore you only need to undervolt your GPU to get higher performance.

I have reference design with power target set to 255W by default and I use additionally MPT to set the GPU Core power target to 275W and 310A TDC in addition to the settings in Radeon Software.

According the bios info page from TPU, the Nitro+ has 289W core and TDC at 300A. I would have tried to increase it a little like for example 310A and it could give you little bit more performance.

Sapphire RX 6800 XT VBIOS

16 GB GDDR6, 500 MHz GPU, 2000 MHz Memory

www.techpowerup.com

You also mentioned that you get better performance when you turn on the computer. That is a little strange with water cooler. I had this before with original cooler as after a few runs temperatures where higher and performance then dropped but I don't notice something like that since I have water cooler.

Speaking of undervolting, I tried 985mV in Port Royal just now and it passed. I'm not sure how stable this is, though.

 

[Felix123BU]

Your settings are very similar to mine but less performance than mine can be explained due to the fact that you need 1010mV and mine works as low as 985mV.
As you have Sapphire Nitro+, this means the power target is already set to 289W by default so you did not need MPT but you could consider increasing TDC a little to get more performance.

Therefore you only need to undervolt your GPU to get higher performance.

I have reference design with power target set to 255W by default and I use additionally MPT to set the GPU Core power target to 275W and 310A TDC in addition to the settings in Radeon Software.

According the bios info page from TPU, the Nitro+ has 289W core and TDC at 300A. I would have tried to increase it a little like for example 310A and it could give you little bit more performance.

Sapphire RX 6800 XT VBIOS

16 GB GDDR6, 500 MHz GPU, 2000 MHz Memory

www.techpowerup.com

You also mentioned that you get better performance when you turn on the computer. That is a little strange with water cooler. I had this before with original cooler as after a few runs temperatures where higher and performance then dropped but I don't notice something like that since I have water cooler.

I am not sure how much more power the 6800XT can take, past cards where over-engineered and could safely take a lot more, this one I am not sure, the 15% max power slider does not give me great confidence in really maxxing it out. I don't want to fry a "650" USD card, also because there is no replacement to be had

Any of you know of a review of the PCB and power delivery system for the 6800XT? I have not found one that goes in depth on how much the card's power delivery system can take.

 

[turbogear]

I am not sure how much more power the 6800XT can take, past cards where over-engineered and could safely take a lot more, this one I am not sure, the 15% max power slider does not give me great confidence in really maxxing it out. I don't want to fry a "650" USD card, also because there is no replacement to be had

Any of you know of a review of the PCB and power delivery system for the 6800XT? I have not found one that goes in depth on how much the card's power delivery system can take.

The only explanation about the power delivery stage of 6800XT I know about is the video of Buildzoid about 6800XT Red Devil.
Red Devil has I think three more phases for core power in comparison to reference design but the power stages used are the same as reference design.
The reference design has 10 phase power supply for VCore and Red Devil has 14 phase if I remember correctly.

Each phase is capable to supply 70A and uses Infineon TDA21472 as power stages. So in theory it is capable of 10x70A=700A but I think you would need LN to cool it then.
The more we draw from the power stages the higher the power dissipation increases i.e. the heat output of the power stage and harder it gets to cool them down, but with our water loop we have higher potential.

If I get time in the near future I will try to calculate the power dissipation for certain amount of load.
As engineer I have the technical background but need some time to read into this DC-DC convertor (step-down buck convertor) worst case calculation topics.

Speaking of undervolting, I tried 985mV in Port Royal just now and it passed. I'm not sure how stable this is, though.

Very nice.
You can run Port Royal Stress test.
It is really nasty and if the GPU is not stable, you will start seeing artifacts after some loops of run.

 

[ratirt]

The only explanation about the power delivery stage of 6800XT I know about is the video of Buildzoid about 6800XT Red Devil.
Red Devil has I think three more phases for core power in comparison to reference design but the power stages used are the same as reference design.
The reference design has 11 phase power supply for VCore and Red Devil has 14 phase if I remember correctly.

Each phase is capable to supply 70A and uses Infineon TDA21472 as power stages. So in theory it is capable of 11x70A=770A but I think you would need LN to cool it then.
The more we draw from the power stages the higher the power dissipation increases i.e. the heat output of the power stage and harder it gets to cool them down, but with our water loop we have higher potential.

If I get time in the near future I will try to calculate the power dissipation for certain amount of load.
As engineer I have the technical background but need some time to read into this DC-DC convertor (step-down buck convertor) worst case calculation topics.


Very nice.
You can run Port Royal Stress test.
It is really nasty and if the GPU is not stable, you will start seeing artifacts after some loops of run.

I found this https://www.reddit.com/r/Amd/comments/koeudw about the 6900XT.
There isn't a lot of 6900xt reviews.
Dude says. 1100mv and 2700Mhz core clock. That's nothing spectacular. AMD locked all the card to basically reach 2700Mhz and that's about it.

 

[Felix123BU]

The only explanation about the power delivery stage of 6800XT I know about is the video of Buildzoid about 6800XT Red Devil.
Red Devil has I think three more phases for core power in comparison to reference design but the power stages used are the same as reference design.
The reference design has 11 phase power supply for VCore and Red Devil has 14 phase if I remember correctly.

Each phase is capable to supply 70A and uses Infineon TDA21472 as power stages. So in theory it is capable of 11x70A=770A but I think you would need LN to cool it then.
The more we draw from the power stages the higher the power dissipation increases i.e. the heat output of the power stage and harder it gets to cool them down, but with our water loop we have higher potential.

If I get time in the near future I will try to calculate the power dissipation for certain amount of load.
As engineer I have the technical background but need some time to read into this DC-DC convertor (step-down buck convertor) worst case calculation topics.


Very nice.
You can run Port Royal Stress test.
It is really nasty and if the GPU is not stable, you will start seeing artifacts after some loops of run.

Thanks, that is helpful, so according to that, theoretically the 6800XT should still be able to take in double at what its set I don't really care that much about efficiency for testing purposes.
I found myself browsing the Buildzoid channel for a long time in the hope of seeing him review a reference 6800XT PCB, or at least a 6900XT ref. No luck, I guess he hates the 6000 series because of its artificially imposed limits, which is a pity.

 

[turbogear]

I found this https://www.reddit.com/r/Amd/comments/koeudw about the 6900XT.
There isn't a lot of 6900xt reviews.
Dude says. 1100mv and 2700Mhz core clock. That's nothing spectacular. AMD locked all the card to basically reach 2700Mhz and that's about it.

I know this reddit page, I also had a deep dive onto it when I had 6900XT to play with.

Thanks, that is helpful, so according to that, theoretically the 6800XT should still be able to take in double at what its set I don't really care that much about efficiency for testing purposes.
I found myself browsing the Buildzoid channel for a long time in the hope of seeing him review a reference 6800XT PCB, or at least a 6900XT ref. No luck, I guess he hates the 6000 series because of its artificially imposed limits, which is a pity.

Yes Buildzoid hates AMD because they limited the frequency and voltage on 6000 series.

 

[Felix123BU]

I found this https://www.reddit.com/r/Amd/comments/koeudw about the 6900XT.
There isn't a lot of 6900xt reviews.
Dude says. 1100mv and 2700Mhz core clock. That's nothing spectacular. AMD locked all the card to basically reach 2700Mhz and that's about it.

"AMD locked all the card to basically reach 2700Mhz and that's about it."

That's also my impression, the 6800XT and 6900XT are basically 2600+ Mhz cards, and that is also the reason the stock frequencies are what they are, quite low. That's also the reason why some here did not see a big difference between the 6800XT and the 6900XT, because they both clock basically the same at the upper end. Had AMD clocked them to what they really are, 2600 Mhz cards, that would have basically negated the performance and price difference between them.

I know this reddit page, I also had a deep dive onto it when I had 6900XT to play with.


Yes Buildzoid hates AMD because they limited the frequency and voltage on 6000 series.

I don't hate AMD for that, I just find it a bit sad, AMD gpu's where traditionally very fun to thinker whit because the limits where more relaxed. No more, you now get a locked card with kick-ass performance only

 

[ratirt]

I wonder if at some point, there will be bios mods that would allow you to unlock the card fully. I would love to try 6900XT past the barriers AMD has put in with voltage, power etc. Not to mention the memory frequency lock.

 

[turbogear]

I wonder if at some point, there will be bios mods that would allow you to unlock the card fully. I would love to try 6900XT past the barriers AMD has put in with voltage, power etc. Not to mention the memory frequency lock.

It is not only frequency and power limit that does not allow higher performance. In many 6900XT and 6800XT it is actually voltage.

Mine 6800XT and 6900XT both could go only to 2640MHz real frequency so still there was headroom until 2700MHz limit. Additionally also both had headroom for me to apply higher power but extra power and higher frequency setting did not help and setting were unstable.
They would need higher voltage to go higher in frequency.

Maybe there is some reason to not allow higher voltages?
I know some SoCs from my work where power supply tolerance are limited to +/-5% on Vcore of 1V.

With the memory there are actually lot of cards out there that even cannot achieve 2150MHz. It is dependent on memory quality.
The Red Devil 6900XT that I tested was memory unstable above 2120MHz. My 6800XT becomes unstable above 2100MHz.
So on both of these cards it does not help if AMD removed the limit of 2150MHz. It would not work anyway.
Maybe they limited memory as they got information from Samsung that these memory units are not allowed to go too high.

 

[Felix123BU]

It is not only frequency and power limit that does not allow higher performance. In many 6900XT and 6800XT it is actually voltage.

Mine 6800XT and 6900XT both could go only to 2640MHz real frequency so still there was headroom until 2700MHz limit. Additionally also both had headroom for me to apply higher power but extra power and higher frequency setting did not help and setting were unstable.
They would need higher voltage to go higher in frequency.

Maybe there is some reason to not allow higher voltages?
I know some SoCs from my work where power supply tolerance are limited to +/-5% on Vcore of 1V.

With the memory there are actually lot of cards out there that even cannot achieve 2150MHz. It is dependent on memory quality.
The Red Devil 6900XT that I tested was memory unstable above 2120MHz. My 6800XT becomes unstable above 2100MHz.
So on both of these cards it does not help if AMD removed the limit of 2150MHz. It would not work anyway.
Maybe they limited memory as they got information from Samsung that these memory units are not allowed to go too high.

Those are some good points, namely max voltage allowed and memory speeds, which seem quite conservative. I still dream of a 6800XT or 6900XT with HBM on it, maybe AMD makes one one day, would be fun to see

 

[Sluppermand]

Finaly I were able to pick up my computer from the repair shop, so now I'm part of this club aswell.


UserBenchmarks: Game 177%, Desk 95%, Work 165%
It says I should ensure I'm running dual channel, I searched as much as I could, but I really can't find the setting in the bios. It's running 3600mhz 14CL as it's supposed to.
However, the Passmark doesn't say anything, and the score is decent, so I believe it's just the Userbenchmark program that has a problem.

It's all stock. I won't be touching anything until I get my 5900X, which sadly, seems to be a few months away according to the latest intel.

With 100% load on the CPU, it became 72 degrees celsius (161 degrees fahrenheit), I'm running a 3600X with a be quiet Dark Rock Pro 4 cooler. Is that normal? Mostly just wandering if I added the correct amount of paste.

 

[Gmr_Chick]

I'd offer to buy you an RX6800 non XT here but shipping to you would kill any savings you'd make just buying one where you live
Powercolor PowerColor Red Dragon Radeon RX 6800 - Graphics card 16GB G $1,224.66 ( $858.24USD) + $???.?? shipping and don't forget Duty

Thank you for the offer regardless though

 

[ratirt]

It is not only frequency and power limit that does not allow higher performance. In many 6900XT and 6800XT it is actually voltage.

Mine 6800XT and 6900XT both could go only to 2640MHz real frequency so still there was headroom until 2700MHz limit. Additionally also both had headroom for me to apply higher power but extra power and higher frequency setting did not help and setting were unstable.
They would need higher voltage to go higher in frequency.

Maybe there is some reason to not allow higher voltages?
I know some SoCs from my work where power supply tolerance are limited to +/-5% on Vcore of 1V.

With the memory there are actually lot of cards out there that even cannot achieve 2150MHz. It is dependent on memory quality.
The Red Devil 6900XT that I tested was memory unstable above 2120MHz. My 6800XT becomes unstable above 2100MHz.
So on both of these cards it does not help if AMD removed the limit of 2150MHz. It would not work anyway.
Maybe they limited memory as they got information from Samsung that these memory units are not allowed to go too high.

Maybe you are right but on the other hand what you are saying is all speculation and looking for a reason why.
If there is a reason, it might be totally different than memory limitations or SoC limitations.
Sooner or later, somebody will come up with a unlocked bios or mod the board and hopefully we will be able to know, how much more you can get from these cards.
Maybe AMD locked them so that these wont exceed the power consumption too much and go overboard with it. This is valid since these cards do not gobble that much power. efficiency would be gone otherwise.