Question Poor RAM performance even on XMP and overclock

[Roland Of Gilead]

You also can look at my PC spec from userbenchmark link that I gave above
but here're they anyway:
MSI X570-A PRO
Ryzen 7 5800X
Nvidia RTX 3080 Ti
PSU Corsair TX750M 750W
Samsung SSD NVMe M2 970EVOPlus 250GB
WD Green SSD M2 240GB
Seagate Barracuda 1TB

My AIDA64 is probably an older version
Unless it also affect their benchmark / tool or stress test, I think it's fine?

Sorry mate, yes, I did see the link for userbench. DOH!

Might be worth updating Aida to see.

But, as mentioned, I think your latency is about right.

 

[Roland Of Gilead]

No, I don't know how to, not even know what does tRC for / means...

You can change that through the bios. Go to memory timings section and then change the tRC value. It may be on auto, and you will manually change that to 58. Save, reboot, and see if it works. If it crashes, switch it back to auto, or whatever the previous setting was.

 

[dnm_13]

Sorry mate, yes, I did see the link for userbench. DOH!

Might be worth updating Aida to see.

But, as mentioned, I think your latency is about right.

Really?
I wish there's someone that I could compare result with...

You can change that through the bios. Go to memory timings section and then change the tRC value. It may be on auto, and you will manually change that to 58. Save, reboot, and see if it works. If it crashes, switch it back to auto, or whatever the previous setting was.

Alright
But before that, anything else I should change beside the tRC? I mean you know that if the RAM configuration fails there's a big chance that you need to reset BIOS settings manually through CMOS reset, so if I could I'd like to avoid that

 

[Roland Of Gilead]

Really?
I wish there's someone that I could compare result with...


Alright
But before that, anything else I should change beside the tRC? I mean you know that if the RAM configuration fails there's a big chance that you need to reset BIOS settings manually through CMOS reset, so if I could I'd like to avoid that

Here's a simple resource: explains timings very well: https://www.crucial.com/support/articles-faq-memory/what-are-memory-timings

 

[dnm_13]

tRC is 85 (it should be 58 instead).

Did you set those values manually?

You can change that through the bios. Go to memory timings section and then change the tRC value. It may be on auto, and you will manually change that to 58. Save, reboot, and see if it works. If it crashes, switch it back to auto, or whatever the previous setting was.

I set the tRC to 58 (from 85), latency decreased from 58.3ns to 57.1ns , could be margin error?

 

[Roland Of Gilead]

Yes, there might be some small changes from run to run, so small variations may occur.

BTW Is Windows up to date fully? Latest bios running? Latest bios can fix unstable ram or increase performance. Worth doing to see if the results are better.

 

[dnm_13]

Yes, there might be some small changes from run to run, so small variations may occur.

BTW Is Windows up to date fully? Latest bios running? Latest bios can fix unstable ram or increase performance. Worth doing to see if the results are better.

Yes, Windows 10 (up to date)
And yes, did an update on BIOS before installing 5800X (from 2700)

 

[Roland Of Gilead]

Okay, all things considered, and unless you buy faster ram, I think you've gotten the latency as low as it will go.

I'm not sure what else to tell you in my own experience, but maybe others will have some further input.

Good luck.

 

[dnm_13]

closing this thread due to no further answer
and unfortunately i still have no answer to my problem, hopefully my future self would find it

 

[SkyNetRising]

Your "problem" isn't a real problem.
Userbenchmark is just being silly. That's it.

 

[dnm_13]

Your "problem" isn't a real problem.
Userbenchmark is just being silly. That's it.

Yeah I hope you're right tho

 

[kerberos_20]

closing this thread due to no further answer
and unfortunately i still have no answer to my problem, hopefully my future self would find it

well the aswer is zen2/zen3 have half of write bandwith then any other processors (compared with either from intel or zen1), thats why you get low userbenchmark score, but aida shows latency and read bandwith as it should be.
real asnwer to this would be that link between CPU die and IO die talks just 16B/cycle, all single die CCX have half of write bandwith, if you use CPU with two CCX dies, you will have 2x16B/cycle and it will give you full write bandwith
amd said games barely use ram writes, they are read and latency dependent
and single CCX is also better for CPU to CPU latency aswell