AMD Ryzen memory optimisation - The effect of tRC timings

AIDA 64 - Memory Performance and Latency

AMD Ryzen memory optimisation trick

AIDA 64 - Memory Performance

When looking at our memory's raw performance in AIDA 64, we can see that our changes to tRC timings have had a positive performance impact. While this impact is small, it is still an increase of around 200MB/s in almost every test.  

While this increase in performance is relatively minor, it is still a marked improvement that is effectively a free performance upgrade for Ryzen users if their system proves stable. 

 AMD Ryzen memory optimisation - The effect of tRC timings

 

Moving to memory latency we see no improvement in our 2666MHz test and a small 0.2ns improvement at 3200MHz, which remained consistent over multiple runs and retests. This decrease is exceptionally minor and pretty much non-existent at 2666MHz.  

  
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
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