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Thread: NEW!!! DRAM Calculator for Ryzen™ 1.6.2 (overclocking DRAM on AM4) + MEMbench 0.8 (DRAM bench) Reply to Thread
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  Topic Review (Newest First)
01-17-2020 02:31 PM
polkfan
Quote: Originally Posted by gerardfraser View Post
Not picking on you cause I quoted your post in particular.
I could run 1933FCLK on 2x3600X and 3800X ,there is no way in the world I got 3 golden samples on Ryzen and others are not getting any.Also I do not need higher voltages to run CL16 3866Mhz but you do need higher DRam voltage to run CL14 3866Mhz.

There is also no real difference between CL14 3866Mhz and CL16 3866Mhz in bandwidth or latency on single rank dimms with tight timings,I do not have dual rank dimms to test.
There is also no real FPS difference in PC gaming when not running CPU limited resolutions(above 1920x1080) with tight timings on Ram between CL16 3600Mhz-CL14 3866Mhz from my testing.

If you would like to see a couple test,I have time to mess around.Name a CPU clock/PBO and Ram timings and please do not ask for Cinebench and I have 3800X to do some test ,sold the 2x3600X.

So i can test Ram up to CL16 4200Mhz tight timings no problem.
I agree i tried 14 and 16 timings on my samsung B-die at 3800mhz i have a high-binned kit and it only changes the speeds in dram calc to 106 vs 111 and my latency goes to 63.1 from 63.5 or so with 16 timings but some people get like 62ns with 14 timings at 3800mhz.

Bullzoid already showed that the infinity fabric scales more then timings do if you can get 3600mhz 14 cas or 3800mhz 16 cas PICK 3800mhz 16.
01-17-2020 12:38 PM
zenuser Does anyone here use 64GB DDR4 (4 dual-rank DIMMs) Hynix CJR on Zen 2 CPU/X470?

I'm having serious trouble to stabilize my setup. Sometimes when I reboot my PC, all settings are being reverted to JEDEC 2133 MHz.

I'm not sure what the problem is exactly. I use DRAM calculator as a starting point (3600 CL16 preset) and I've even tried increasing the DRAM voltage (recommended is 1.35V).

I've tried 1.40V and I still got a BIOS JEDEC reset. Not I'm up to 1.44V, but I'm afraid degrade is inevitable.

I know my setup is not the most common one and I've been scouring the internet for similar setups since December to no avail.
01-17-2020 09:54 AM
gerardfraser
Quote: Originally Posted by eliwankenobi View Post
I'll be waiting for those benchmarks too! 1933 IF could mean a lot of stress on the memory controller too, higher voltages, high temps too I would assume.

But if you can get that stable at 3866mhz at CL16 or CL17 timings, golden sample right there! I would also try all core OC on that chip, see how high I go. Worth trying
Not picking on you cause I quoted your post in particular.
I could run 1933FCLK on 2x3600X and 3800X ,there is no way in the world I got 3 golden samples on Ryzen and others are not getting any.Also I do not need higher voltages to run CL16 3866Mhz but you do need higher DRam voltage to run CL14 3866Mhz.

There is also no real difference between CL14 3866Mhz and CL16 3866Mhz in bandwidth or latency on single rank dimms with tight timings,I do not have dual rank dimms to test.
There is also no real FPS difference in PC gaming when not running CPU limited resolutions(above 1920x1080) with tight timings on Ram between CL16 3600Mhz-CL14 3866Mhz from my testing.

If you would like to see a couple test,I have time to mess around.Name a CPU clock/PBO and Ram timings and please do not ask for Cinebench and I have 3800X to do some test ,sold the 2x3600X.

So i can test Ram up to CL16 4200Mhz tight timings no problem.
01-17-2020 07:44 AM
eliwankenobi
Quote: Originally Posted by rastaviper View Post
Still is will be interesting to see a comparison between 3733 at 14-14-14 and 3933 at any timings possible (probably 17-17-17).

Sent from my ONEPLUS A6003 using Tapatalk
I'll be waiting for those benchmarks too! 1933 IF could mean a lot of stress on the memory controller too, higher voltages, high temps too I would assume.

But if you can get that stable at 3866mhz at CL16 or CL17 timings, golden sample right there! I would also try all core OC on that chip, see how high I go. Worth trying
01-17-2020 07:41 AM
eliwankenobi
Quote: Originally Posted by 2600ryzen View Post
Nice! Thank you!
01-17-2020 04:52 AM
rastaviper
Quote: Originally Posted by Saiger0 View Post
This is not true.

3800 is the so called "top performance" because 99% of cpus can´t go further than that while keeping the 1-1 mode. 1900 mhz IF seems to be the frequency limit for zen2. Thats why you wont find any benchmarks of it.



Anyone with 1933 is truly lucky and can expect superior performance (even though they are still limited by the 32B/cycle link)
Still is will be interesting to see a comparison between 3733 at 14-14-14 and 3933 at any timings possible (probably 17-17-17).

Sent from my ONEPLUS A6003 using Tapatalk
01-17-2020 02:01 AM
Saiger0
Quote: Originally Posted by rastaviper View Post
There is no point trying to pass the 3800mhz mark. For which reason?
All reviews are mentioning that the top performance is achieved around the 3733-3800, not higher where there are also examples of getting worse results.

Sent from my ONEPLUS A6003 using Tapatalk
This is not true.
3800 is the so called "top performance" because 99% of cpus can´t go further than that while keeping the 1-1 mode. 1900 mhz IF seems to be the frequency limit for zen2. Thats why you wont find any benchmarks of it.

Anyone with 1933 is truly lucky and can expect superior performance (even though they are still limited by the 32B/cycle link)
01-17-2020 01:54 AM
2600ryzen
Quote: Originally Posted by eliwankenobi View Post
Please do share the link..

Probably means this one - https://github.com/integralfx/MemTes...0OC%20Guide.md
01-17-2020 01:39 AM
polkfan
Quote: Originally Posted by rastaviper View Post
There is no point trying to pass the 3800mhz mark. For which reason?
All reviews are mentioning that the top performance is achieved around the 3733-3800, not higher where there are also examples of getting worse results.

Sent from my ONEPLUS A6003 using Tapatalk
I think he means people that can run at 1933 FCLK which for the first time i saw on this thread.

I guess with TSMC getting their node more mature we might see this slightly more often
01-17-2020 01:09 AM
rastaviper
Quote: Originally Posted by ylpkm View Post
For those who are able to run over 3800mhz and keep a 1:1:1 ratio, did you have any problems getting it up and running? How did you do it or what settings were required to achieve that?



I don't know if it's my board (Msi X370 sli) or the bios revision, or my ram sticks (Bdie), or motherboard settings, but I cannot post at 3866mhz or higher 1:1 or even 2:1. I kept soc around 1.1v and up to 1.15v and it wouldn't post. I'm running a 3900x.
There is no point trying to pass the 3800mhz mark. For which reason?
All reviews are mentioning that the top performance is achieved around the 3733-3800, not higher where there are also examples of getting worse results.

Sent from my ONEPLUS A6003 using Tapatalk
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