Re:AMD Ryzen 7000 Burning Out: Impacts all 7000 processors
by ilyt on Wednesday April 26, 2023 @10:22PM
(#35722565)
IF maxes around ~2GHz on current chips so it is impossible to run it 1:1 on anything faster than DDR5-4000, but apparently something was improved along the way, and optimal RAM speed is at mentioned 6000 and not matching doesn't hurt as much in Zen 4
At least from this test https://www.hardwaretimes.com/ddr5-6000-memory-and-2000mhz-f...
it appears that even with mismatched clock (the 2166 IB with 6000MHz memory) latency continues to drop, and problems start if you try to run memory controller above that
I was still using Windows when I did everything with my 3950x. I used AIDA64 for the memory, specifically paying attention to latency (which is the strongest signal you will see for IF 1:1). Other than that it was a few tests that matched my anticipated workload: pi for stability, 3DMark for games (another decent signal), compilation speed for dev.
On Linux+7950x I just did some subjective tests (I have less time these days) with rust-analyzer responsiveness and there definitely was an improvement, but I can't quantify how much.
I might be less of an issue for a 7800 because, as far as I remember, it doesn't use chiplets.