buildzoid
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Does setting tRCDWR to 8 do anything?
🕑 Added 2022-08-30 08:40:01 +0000 UTCYes it does.
Py Prime 2B running on a 4750G with 1xCh 1Rx8 Hynix 8Gb CJR
2400Mbps (timings have more impact at lower memory clocks as each tick is longer)
12-16/8-16-28-1T
23.862s 23.833s 23.749s
12-16/16-16-28-1T
24.417s 24.513s 24.372s
12-16/26-16-28-1T
25.715s 25.701s 25.712s
On many many(probably most) DDR4 memory chips it's possible to set tRCDWR to 8 with no effect on stability. As you can see from the Py Prime results this does lead to a slight performance increase. So there's 0 reason not set your tRCDWR to 8(if it's passing stress tests). The main reason I decided to make this post is because I see a lot of screenshots of people with Ryzen setups running tRCDWR at pretty much random numbers that aren't 8 even on ICs where I know with 100% certainty that 8 works.
Comments
Mike Quinton
When talking about the new Ryzen 7 CPUs, when you talked about the base frequency, my question is if a laptop can run at a low frequency and a desktop runs at 5.7 or so, what is the actual advantage of the higher frequency? I always hear that it makes programs run faster, so my question is faster than what? Doesn't software in and of itself limit the speed that it is supposed to run. If the game runs "too fast" what does that do the FPS? The same question applies to RAM in that if I do not XMP the RAM from 26 to 38, what difference does it make or doesn't matter only in games?
