So, I "finished" a temporary build of 3990X. Temporary because crucial part for my water-loop might be missing for at least another 3 weeks. Neither did my memory comes, which will be roughly same delay or lot more.
In interim, I used Noctua UH14s-TR4 and my existing Corsair 128GB 3000 CL15 (not a very high-quality memory).
Few random finds:
- Straight from fresh installation, stock bios, stock Windows 10 settings (not even power mode to high), no XMP (so memory is on 2133 only), the score is 17 seconds. Mostly gets reported like 17.4-17.8 into actual database. Very satisfied.
- XMP didn't even boot... so I manually set it to 2933 CL16/18/18/18/36 for standard conservative setup and that booted up with no issues...but SURPRISE :- ) read below:
- I expected this to happen and it really does, the power limit is for IO + 8 Dies. So the higher the stress on memory controller, the lesser will be all-core boosts. Actually more than -100 MHz,..but, with same performance.
( You can put less stress on memory controller by using 4x32 instead of 8x16. Of course, with 8x32GB, the setup would be maxed out anyway )- So that means faster memory still improves performance...but taxes the CPU which is already on conservative power limit (280W) for that many cores. PBO can offset this but I don't want to play around with it right now.
- The score is once again 17 seconds.
- Windows 10 still have CPU groups. The Windows patch only solved the incorrect reporting of "sockets". You can check this for any process affinity.
- Fast memory + PBO (+200) would give the 16 seconds or perhaps bit less.
And some issues:
- I've read about it somewhere else...so did already happen to someone just can't remember where. Upon random restart (by myself), the CPU only ran at <1GHz (more like 0.5! GHz) frequency, and would only run 16 threads? After restart, it once again corrected itself. EDIT: Solved, this is memory related issue. Changed last timing to 38 and upped voltage to 1.36. After 20 restart and cold-boots, it never materialized again. I really want to try with better memory..
- I will test for another bug I read about.. crash with AVX instruction with specific load of Prime95. This could be Prime95 issue, but I would rather test this. Didn't have time yet.
- Noctua UH-14S wasn't made for dual-fan and it shows...the resonation is annoying. Either you have to run different fans (120 vs 140) for pressure or run different speeds to avoid this but I just took the fan away. There is no difference with such narrow heatsink.
- This CPU is actually quite easy to cool :- ). Eh...I already have the loop though.