Hi guys!
A question for the most experienced ones:
After many successful attempts with E5 v3 xeons, I'm currently struggling with a quad E7 V3 QS system.
Microcodes removed from BIOS.
I can compile freecableguy's efi latest driver with the 306F3 microcode and it runs at bootup just fine.
Sets all turbo multipliers to 33x and the -50mV offsets.
When the OS loads up I see all cores in cpu-z between 3.0-3.3 GHz, that is fine.
But as soon as I apply heavy load on the cores it resets itself back to the stock 29x.
I've been looking at MSR documentations for the last few days.
Also tried to compile the efi with different combinations of the switches (enable/disable VR, lock the OC, override FIVR, etc.)
But nothing helps.
I checked the related MSRs in OS and everything seems to be fine. All the turbo ratios remain 33x in all three MSR 0x1AD, 0x1AE, 0x1AF.
But actual clock is still stuck at 29x.
I also noticed something weird, that in throttlestop the EDP limit becomes red (and also the max turbo is red, however it still shows 33x is set for all cores) and I can't change the locked 220A current limit.
I even tried to overwrite it (MSR_PACKAGE_CURRENT_LIMIT 0x601 12:0) in the EFI driver to 300A, but has no effect and remains at 220A.
The voltage mods are working well by the way. The cpus dropped 10C on full load.
I see that freecableguy claims that the hack works on E7 Haswell CPUs too, but I cannot find any evidence around the web.
Update: I have found the screenshot in this forum of the 306F2 ES E7 V3 on unlocked all-core turbo, but what about 306F3?
Update2: Meanwhile I found that Win10 does not have any microcode for 306F3, so I was running with no microcode. I also tried microcodes A and D, but nothing actually changes. I'm starting to think that only E7 ES 306F2 is able to unlock all-core turbo and F3&F4 aren't.
I appriciate any help!