AMD Ryzen memory optimisation - The effect of tRC timings

3DMARK Performance

AMD Ryzen memory optimisation trick

3DMARK Sky Diver

In 3DMARK Sky Diver we can see a noteworthy impact on performance, with upticks in CPU, combined and final benchmark scores. 

The most improvement is seen when using 3200MHz memory, which is likely due to the larger change in tRC value. Our improvements to our memory's tRC timings is enough to boost our Sky Diver scores to over 45,000, with a 500 point boost. 

 

AMD Ryzen memory optimisation - The effect of tRC timings

 

3DMARK Fire Strike

Moving to 3DMARK Fire Strike we can see similar improvements to what we see in 3DMARK Sky Diver, with boosts in CPU, combined and final scores.  

In this case, using out new tRC timings was almost enough to allow our 2666MHz memory to offer the same performance as out 3200MHz hit at stock timings. If you want the best benchmark score tRC memory timings are certainly worth adjusting.   

  
AMD Ryzen memory optimisation - The effect of tRC timings

 

3DMARK Time Spy

In 3DMARK Time Spy we found that once again our changes to tRC timings have a much larger effect on performance when using faster memory kits, making this change a must for users of 3200MHz memory kits.  

The performance boost seen here is much lower when we are using 2666MHz memory kits, though there is still a small impact.  

  
AMD Ryzen memory optimisation - The effect of tRC timings  

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Most Recent Comments

18-07-2017, 13:59:45

Chrazey
I like it how the test rig specs in the box say "1080 Founders Edition", although the picture of the PC under it shows and ASUS Strix card Quote

18-07-2017, 14:02:05

WYP
Quote:
Originally Posted by Chrazey View Post
I like it how the test rig specs in the box say "1080 Founders Edition", although the picture of the PC under it shows and ASUS Strix card
That is the thing with test beds, hardware changes all the time. I can't take pics with every hardware configuration.Quote

18-07-2017, 14:08:58

Chrazey
Quote:
Originally Posted by WYP View Post
That is the thing with test beds, hardware changes all the time. I can't take pics with every hardware configuration.
No no, I understand dude. I was just pointing it out, not to put it in your face or anything though.Quote

18-07-2017, 16:49:54

harrison
For whatever it's worth, my memory/motherboard does not seem to exhibit this issue. My XMP 2.0 values populated and booted without any fussing, and the tCR value is accurate.

MB: ASRock AB350M Pro4, BIOS v2.5 (AGESA 1.0.0.6)
Ram: Corsair LPX 2x8GB 3200MHz C16 (CMK16GX4M2C3200C16S)
Timings: 16-18-18-36-54-1 (tCAS-tRC-tRP-tRAS-tCS-tCR)
https://valid.x86.fr/te3x7z

A new update was just released today for AGESA 1.0.0.6a, so I'll need to see how that impacts things, but in this one case at least, things appear to not wonky.Quote

18-07-2017, 17:12:14

WYP
Quote:
Originally Posted by harrison View Post
For whatever it's worth, my memory/motherboard does not seem to exhibit this issue. My XMP 2.0 values populated and booted without any fussing, and the tCR value is accurate.

MB: ASRock AB350M Pro4, BIOS v2.5 (AGESA 1.0.0.6)
Ram: Corsair LPX 2x8GB 3200MHz C16 (CMK16GX4M2C3200C16S)
Timings: 16-18-18-36-54-1 (tCAS-tRC-tRP-tRAS-tCS-tCR)
https://valid.x86.fr/te3x7z

A new update was just released today for AGESA 1.0.0.6a, so I'll need to see how that impacts things, but in this one case at least, things appear to not wonky.
Well that is certainly a positive thing to hear, one of the main points for this is to raise awareness and get a potential fix in future BIOS' if possible. I do remember the Taichi having the issue at launch, so this is likely a recent development.

Hopefully other manufacturers will soon follow suit. It is memory performance that is simply sitting on the table.Quote
Reply
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