Threadripper/Asus performance confusion using DOCP/XMP

[B.Rms]

I did Google this but didn't find something so specific. Maybe someone has an idea of what's going on.

Check system specs in my signature.

 

Story:

 

With DOCP (AMD's version of XMP) turned on in the BIOS, the RAM runs at 3600 but I've noticed that my CPU wouldn't hit 100% while running cinebench r23, not even getting hot enough for the fans to go much faster. That reflected in the score: I was getting around 41000 while I found online that this Threadripper CPU should get around 43000. (I also tested with all the performance enhancements I could find set to maximum in the BIOS, still couldn't hit 100% usage).

 

So I set the BIOS to the defaults (DOCP off). The RAM went back to stock 2333, but the CPU now hits 100% on cinebench and the score went UP to the expected >43000 with technically slower RAM! A video export test from Davinci took 32 seconds.

 

I understand the performance gain at lower frequency can be a timing issue with the XMP profile, so for the next test I kept the BIOS on defaults with DOCP off again, but this time I manually entered all the timings, frequency (3600) and voltage for the RAM according to the XMP profile which I found using Thaiphoon software. With this setup, cinebench is hitting a lower score again (about 41900) but the video export speed actually went quite a bit faster, around 24 seconds.

 

I may be missing something here, but how can I get faster results on Davinci when the settings give me a lower score on cinebench?

 

[Prodigy_Smit]

32 minutes ago, B.Rms said:

I may be missing something here, but how can I get faster results on Davinci when the settings give me a lower score on cinebench?

 

Its possible that due to the speed bump da vinci is able to more quickly provide the CPU with files that it needs to export hence the faster time. I would not worry too much about the cinebench score if your actual work with the system is faster.

[Fasauceome]

Cinebench is a tile based renderer, and doesn't need the cores to communicate very fast.

 

Fast ram on AMD Ryzen CPUs improves core to core speed, and thus will improve performance in every program that isn't a tile based renderer (so basically everything that is isn't cinebench and a couple other things)

[B.Rms]

1 hour ago, Prodigy_Smit said:

if your actual work with the system is faster.

Well, that's exactly my thoughts.

 

1 hour ago, Fasauceome said:

Cinebench is a tile based renderer, and doesn't need the cores to communicate very fast.

 

Fast ram on AMD Ryzen CPUs improves core to core speed, and thus will improve performance in every program that isn't a tile based renderer (so basically everything that is isn't cinebench and a couple other things)

Sounds logical. So typing all the settings manually for the RAM according to Thaiphoon and leaving everything else as optimized defaults is a valid way to setup the BIOS? Because it's the only way I found to make both the CPU and RAM run at max stock speeds without overclocking.

[Fasauceome]

1 hour ago, B.Rms said:

Sounds logical. So typing all the settings manually for the RAM according to Thaiphoon and leaving everything else as optimized defaults is a valid way to setup the BIOS? Because it's the only way I found to make both the CPU and RAM run at max stock speeds without overclocking

Yep