Ryzen 3900X can't clock 1800MHz Infinity Fabric with 3600 CL14. Disappointed with Ryzen.

[gerardfraser]

I do not think the OP can follow instructions or take any advice or he is just not sure at all.Someone with the same motherboard maybe should help him out and take motherboard screenshots and write on each setting what it is.
Here is a crappy cheap X470 Motherboard with the cheap 3600X. 3900x is more than capable of running 3600Mhz Ram on a ratio of 1:1:1 synced.

Also not sure why he is showing membench but here is membench with settings.If membench for errors take Wavetrex advice

 

[chief-gunney]

try procODT= 60

 

[TheLostSwede]

I do not think the OP can follow instructions or take any advice or he is just not sure at all.Someone with the same motherboard maybe should help him out and take motherboard screenshots and write on each setting what it is.
Here is a crappy cheap X470 Motherboard with the cheap 3600X. 3900x is more than capable of running 3600Mhz Ram on a ratio of 1:1:1 synced.

Also not sure why he is showing membench but here is membench with settings.If membench for errors take Wavetrex advice

In all fairness, running the IF at anything above 1800MHz is hit or miss and very CPU dependent.
But yes, 3600MHz shouldn't be impossible, but it might be his RAM that's the limiting factor here, as not all RAM works well with Ryzen 3000.

 

[gerardfraser]

Yes you are correct and fair.All we can do is give reasonable advice and it is up to the OP to try any all advice.I would be very unhappy if I bought the gear the OP bought and it does not work.I would be surprised if it really did not work.

I just re-quote the post I made to try to help out OP

I somehow doubt that a 3900X with the gear that @KhakiKukhi has can not run up to max 1900 Infinity Fabric.

Some things to try.First get proper setting for the ram and then apply enough voltage to the Ram,Soc etc.

Suggestion for Ram Download DRAM Calculator for Ryzen with Thaiphoon burner

In thaiphoon burner export your XMP profile with complete HTML Report and save delays in nanoseconds to desktop or somewhere you would remember.
Then import the XMP complete HTML Report to DRAM Calculator for Ryzen

Then in the DRAM Calculator for Ryzen pick the settings you want and try them,they are meant as a guide. Print out setting from main and advanced or write them down.

In BIOS set everything to optimized defaults and restart back in to BIOS.

In BIOS input the settings from the DRAM Calculator for Ryzen-depending on what settings you picked voltages may be different.
Disable-PBO for now,can re-enable anytime
Set DRAM voltage to 1.5v for now ,can lower later
cLDO VDDG - 0.900v Most likely your auto settings set this to high,use recommended setting from DRAM Calculator for Ryzen
cLDO VDDP - 0.950v Most likely your auto settings set this to high,use recommended setting from DRAM Calculator for Ryzen
SOC - 1.12v -Set to max from DRAM Calculator for Ryzen for now.I use higher than max on my system for stability.
DDR4-Set to 3600Mhz or whatever you picked in DRAM Calculator for Ryzen
The memory clock (mclk), the memory controller clock (uclk), and the infinity fabric clock (fclk) all need to be synced for best results.
So in BIOS set fclk-1800Mhz or half of whatever you picked in DRAM Calculator for Ryzen
So in BIOS set mclk=uclk
When set the mclk:uclk:fclk should be set to ratio1:1:1 for best results.

Give these a try without toughing anything else in your BIOs and see how it goes.

 

[KhakiKukhi]

Yes you are correct and fair.All we can do is give reasonable advice and it is up to the OP to try any all advice.I would be very unhappy if I bought the gear the OP bought and it does not work.I would be surprised if it really did not work.

I just re-quote the post I made to try to help out OP

Alright I did everything you said to do, in the order that you listed:

1. In BIOS input the settings from the DRAM Calculator for Ryzen-depending on what settings you picked voltages may be different.
2. Disable-PBO for now,can re-enable anytime
3. Set DRAM voltage to 1.5v for now ,can lower later
4. cLDO VDDG - 0.900v Most likely your auto settings set this to high,use recommended setting from DRAM Calculator for Ryzen
5. cLDO VDDP - 0.950v Most likely your auto settings set this to high,use recommended setting from DRAM Calculator for Ryzen
6. SOC - 1.12v -Set to max from DRAM Calculator for Ryzen for now.I use higher than max on my system for stability.
7. DDR4-Set to 3600Mhz or whatever you picked in DRAM Calculator for Ryzen
8. The memory clock (mclk), the memory controller clock (uclk), and the infinity fabric clock (fclk) all need to be synced for best results.
9. So in BIOS set fclk-1800Mhz or half of whatever you picked in DRAM Calculator for Ryzen
10. So in BIOS set mclk=uclk
11. When set the mclk:uclk:fclk should be set to ratio1:1:1 for best results.

Except for 10 "So in BIOS set mclk=uclk." I couldn't find the bios setting for it.




This is the settings the DRAM Calculator generated:

This is the memtest result. I still have yet to do overnight stability testing:

Here is the Ryzen Master screenshot:

After 5 consecutive Cinebench R20 benchmarks, it doesn't black screen and reset anymore.
But the latency is still 70ns+.
I'll be running a overnight stability test tonight.

 

[biffzinker]

Except for 10 "So in BIOS set mclk=uclk." I couldn't find the bios setting for it.

From your Ryzen Master screenshot the board is running with Memory/Infinity Fabric in a 1:1:1 ratio. The Coupled Mode: On under the "Memory Control" is the one to look at.

 

[KhakiKukhi]

From your Ryzen Master screenshot the board is running with Memory/Infinity Fabric in a 1:1:1 ratio. The Coupled Mode: On under the "Memory Control" is the one to look at.
View attachment 131031

Yup! I see.
It doesn't black screen and reset in Cinebench anymore and I'll be running an overnight stability test.
Only problem is the memory latency.

AIDA64 also shows 70ns+ latency:

 

[Agent_D]

I have the same issue with a 3600X on ASRock X570 Steel Legend. I can run memory and IF at 3533 no problem, as soon as I try to do 3600/1800, it won't boot, regardless of SOC voltage/DRAM voltage, or any combo of voltages in between. I don't know if it's board, or CPU, or a combination of both, but honestly the difference in performance from 3533 to 3600 is going to be absolutely negligible.

 

[KhakiKukhi]

I have the same issue with a 3600X on ASRock X570 Steel Legend. I can run memory and IF at 3533 no problem, as soon as I try to do 3600/1800, it won't boot, regardless of SOC voltage/DRAM voltage, or any combo of voltages in between. I don't know if it's board, or CPU, or a combination of both, but honestly the difference in performance from 3533 to 3600 is going to be absolutely negligible.

I'm glad I'm not the only one! I hope you too manage to resolve the issues.

 

[Agent_D]

I honestly gave up, I spent probably 40-60 hours trying every BIOS setting and combination of voltages that I could with no resolution. I just gave up and settled at 3533 for both memory and IF because the 67MHz to 3600 is literally nothing in performance terms.

 

[KhakiKukhi]

I honestly gave up, I spent probably 40-60 hours trying every BIOS setting and combination of voltages that I could with no resolution. I just gave up and settled at 3533 for both memory and IF because the 67MHz to 3600 is literally nothing in performance terms.

That's EXACTLY what I did. I finally gave up and settled for 3533 on RAM and 1767 on IF.
I decided to give it one last try and followed gerardfraser's instructions. It seems to be working so far and I'm currently stability testing my RAM overnight.

 

[Zach_01]

 

[KhakiKukhi]

View attachment 131038View attachment 131039View attachment 131040View attachment 131042View attachment 131045View attachment 131046View attachment 131047View attachment 131048View attachment 131049View attachment 131050View attachment 131051View attachment 131052

That's what I did, except for the "OC", I'm using stock cooler and still waiting for my AIO. But I'm still getting 70ns latency.

 

[biffzinker]

But I'm still getting 70ns latency.

What happens if you do the memory tweaking through Ryzen Master?

Share your AIDA 64 cache and memory benchmark here

3200@3600 cl14

www.techpowerup.com

^

But now it got funky. I discovered a difference in performance when entering timings directly into bios or through Ryzen Master. Above is Ryzen Master. Below is BIOS

 

[Zach_01]

???
UCLK==MEMCLK

And this is a very nice explanation of ZEN2 memory subsystem

 

[gerardfraser]

That's EXACTLY what I did. I finally gave up and settled for 3533 on RAM and 1767 on IF.
I decided to give it one last try and followed gerardfraser's instructions. It seems to be working so far and I'm currently stability testing my RAM overnight.

Good job so far but you missed a couple sub timings and import of XMP from taiphoon burner.That is why your latency is still high.The good thing is you are not crashing as you said and I have a feeling that with some more guidance you will get better results and stable also.For the most part your RAM settings look good.

Also on ebay you can buy a lifetime subscription for AIDA64 for $1.49USD.

After all your testing for stability and 70ns is still OK for gaming and applications,it does not need to be faster.
Try to lower your tRFC @ 630 lower that to 345 and test for black screen,memory test and this will lower latency but not essential for now.
Now you been messing with your stuff over a week,take it slow I will try to help you out if you have problems and others will also help.

Also #10 is the list ,if it is not in your BIOS that is fine.Your motherboard will set it correctly and it looks like it did.Here is wishing you have good results in stability test.

 

[phanbuey]

trfc also has 'straps' that it's stable on I think there are JEDEC specs that go something like 560, 416, 36something, 313 and 293 - but your SPD has the specs; I've found that sticking to the ratios on the SPD gave me less stuttering in far cry 5. 364/293 was smoother than 330/300 etc.

 

[KhakiKukhi]

I've done overnight stability testing for 575 minutes. No errors.

Good job so far but you missed a couple sub timings and import of XMP from taiphoon burner.That is why your latency is still high.The good thing is you are not crashing as you said and I have a feeling that with some more guidance you will get better results and stable also.For the most part your RAM settings look good.

Also on ebay you can buy a lifetime subscription for AIDA64 for $1.49USD.

After all your testing for stability and 70ns is still OK for gaming and applications,it does not need to be faster.
Try to lower your tRFC @ 630 lower that to 345 and test for black screen,memory test and this will lower latency but not essential for now.
Now you been messing with your stuff over a week,take it slow I will try to help you out if you have problems and others will also help.

Also #10 is the list ,if it is not in your BIOS that is fine.Your motherboard will set it correctly and it looks like it did.Here is wishing you have good results in stability test.

I exported my memory stuff from Thaipoon Burner and imported them into Ryzen DRAM Calculator. I don't know what I would have missed.

 

[Chomiq]

Yeah I've also stuck to DRAM Calc settings and ended up with latency ~70 with E-die. That's at Fast CL14 3466.

 

[TheLostSwede]

Yup! I see.
It doesn't black screen and reset in Cinebench anymore and I'll be running an overnight stability test.
Only problem is the memory latency.

AIDA64 also shows 70ns+ latency:
View attachment 131033

That could be down to the UEFI though, it might not have been tuned properly for your RAM yet.
Your Row Cycle Time is also quite high, which might have some small affect on the latency.
Also, are any background processes running while you test with AIDA? If anything else is accessing the RAM. the latency will go up.
Everything else looks fine, although the DRAM Voltage is a bit on the high side, so maybe try lowering step by step to something more reasonable like 1.4V.

I have the same issue with a 3600X on ASRock X570 Steel Legend. I can run memory and IF at 3533 no problem, as soon as I try to do 3600/1800, it won't boot, regardless of SOC voltage/DRAM voltage, or any combo of voltages in between. I don't know if it's board, or CPU, or a combination of both, but honestly the difference in performance from 3533 to 3600 is going to be absolutely negligible.

Most likely UEFI related. Could be that the IF doesn't want to run that fast. Technically you are overclocking the IF, as the highest speed AMD ever claimed to be in spec, is 1600MHz, i.e. 3200MHz RAM.

 

[KhakiKukhi]

Your Row Cycle Time is also quite high

Yeah. I just entered what the DRAM Calculator gave me.

Try to lower your tRFC @ 630 lower that to 345 and test for black screen

I tried tRFC at 345 and 496. I can't boot.

 

[Zach_01]

On mine, tRFC is 653(all timings XMP/auto) and Im getting 67,5~68 latency. With 3733 tho, and UCLK=MEMCLK=FCLK (1866).
I also tried what DRAMcalc suggests (various settings) and latency goes 71~72.

 

[TheLostSwede]

Yeah. I just entered what the DRAM Calculator gave me.

I tried tRFC at 345 and 496. I can't boot.

Sure, I understand that, just something worth trying to tune step by step to see if it can be improved upon.
Unfortunately, getting the most out of your RAM right now, includes a lot of reboots and manual testing.
I've used a combination of trying various options and the DRAM Calculator settings and have ended up at slightly tighter timings than the DRAM calculator suggests.

 

[KhakiKukhi]

Sure, I understand that, just something worth trying to tune step by step to see if it can be improved upon.
Unfortunately, getting the most out of your RAM right now, includes a lot of reboots and manual testing.
I've used a combination of trying various options and the DRAM Calculator settings and have ended up at slightly tighter timings than the DRAM calculator suggests.

Oh definitely! I'm willing to go through reboots and manual testing. How would I do that?

 

[TheLostSwede]

Oh definitely! I'm willing to go through reboots and manual testing. How would I do that?

It's really just a matter of trying to reduce the timings you've already got at this point, one by one, to see what works and what doesn't.
Obviously you should save a profile in your UEFI first, so you can quickly restore all the settings you now have working, so you don't have to set them all manually again.
I think the two you can try to start with is tRCDWR (16) and tRC (mine is 48, but that means nothing, different DRAM ICs).
Beyond that, I'm not sure what's worth tweaking and I'm not sure you'll be able to boot with tighter tRCDRD or tRP timings. My system doesn't like me touching those two options at all.

The other option is to go the other way, increase the CAS to 16 and see if you can run the memory at 3733 or 3800MHz, with the IF interface set to the matching speed.