There is an interesting question: is there any way to disable AVX frequency drop on Haswell-EPs? (These are our E5 v3s). Must be, because desktop Haswell-E (Core i7) does not have this "feature".
It exists on i7 Haswell as well, both my old 5820K and 5930K dropped 1 turbo bin when AVX was in use. It also needed a lot of voltage when overclocked to maintain it. With no microcode Haswell EP should only drop 1 or 2 bins.
My E5-2686 v3 dropping more - from 2.9 GHz frequency can go as low as 2,6 GHz. (29x - 26x), mostly stays on 27x.
What tool do you use to test AVX-Performance?
which bios you using alex p5
Different ones. From Corona to Y-Cruncher (last one have binaries with AVX/AVX2 support and without it, so it's easy - HWiNFO on second monitor, benchmark on main).
I testet AVX with my setup now (2x E5 2620 v3), there are no clock drops, all cores stay at x32 multiplier. I have mcode version 39.
Alex S, I don't experience frequency drop, even though my E5-2696 V3 R2 has 18 cores. The thing is in order to achieve this I have to abandon using microcode. But I have absolutely no stability issues when I do that.
Hey,
I have a Z10PE-D8 WS and 2x 2683v3's. Can anything go really wrong with this mod? Does this work with Ubuntu too? Does anyone have a stable setup like mine with the unlock?
The thing is, unless you use one of the EFI drivers that have microcode built in (V3x2_cp27.efi, V3x2_cp39.efi, V3x2_cup27.efi or V3x2_cup39.efi), or load microcode via VMWare driver, you end up with no microcode loaded (given you flashed modified BIOS, of course).Sciff, so you are saying no microcode in the bios, but as far as the vmware driver goes: 0x27 microcode for best performance or the 0x39 driver for better stability?
Or did you find a way to eliminate the microcode completely?
I don't exactly understand what you mean. My 2696 V3 R2 does work at x12 or 1200 MHz when idle, because I haven't turned off EIST (Enhanced Intel Speedstep Technology) in BIOS.Also are there options to change turbo MSR's on the fly in windows 10 or is there a workable "idle" setting possible from the bios when there is no CPU load?
I think I read about someone who was able to use idle state for no load?
Alex S, how soon after system startup have you made this observation? For example, I also notice this for about first two minutes after startup. Then, the core multipliers drop to x12 and unless I run something at least lightly demanding, it stays that way. Кстати, привет Таллину от Дублина
Has anyone tried Dual/Quad CPU Supermicro boards and posted the results? I have Supermicro X10DAi and would like to try out this mod.