Originally Posted by Steven Stacy
I agree. I pretty much figured out the rule of thumb on my setup. It's all about temps. ~50 is like 4275 ~60 4250 ~68 4175 ~70 4150 etc.
I can undervolt vcore / SOC to lower temps but then I have to increase the scaler for the higher boost to compensate and I get the same 9800+ scores and temps.
I can increase LLC ; that seems to allow higher temps on certain frequency but frequency caps at lower frequency as llc increases.
Not much else to test unless I can lower my temps additional 8c to get CB20 10000 score with PBO. Seems like it should boost max until 80c.
LLC increases temperature = lower clocks... But you need more voltage for higher frequency... Temperature & voltage battle each other for frequency gains with PBO. You hit the sweet spot and your good and all you can do is try maximize cooling the last few increments.
The higher voltage will help in low current single-core to boost higher but your all-core Cinebench & Prime95 AVX etc will not get better as you are temperature limited according to the algorithm.
You can change the temperature limit in PBO settings. AUTO is 90C as far as I've seen yet. If you are adventurous you can choose 95C but above you might issues with stability if you allow it to run long hours.
I've found that about ~100A TDC is the limit that you able to cool per 8-core CCD-die with your cooling even if using waterblocks. So 3950X could do 200A TDC with proper cooling until temperatures become unmanageable.
Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 22.214.171.124.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 126.96.36.199.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
2x8GB 3866/1933 188.8.131.52.60.tRFC 448 1T 1.590V Kingston HX436C17FB3K2/16 3600C17 1.35V (Hynix DJR 17nm)
Last edited by Nighthog; 06-02-2020 at 01:55 AM.