vladmire

it would be nice if there is a full translation on how the owner did it... im thinking of doing this with my OOW clevo too.

You can lock the CPU to never run slower than 3ghz, but as for actual overclocking that is not possible (unless AMD reference clock documentation gets leaked).

How to lock to 3ghz and 3.5ghz:

There is no program that does it properly, so you need to do it directly with PCI config space writes. I use BAR-EDIT on the trinity laptop I have access to. The way the method works is you just limit the number of P-states the processor is allowed to use. PScheck can do this, but it neglects changing what P-state the CPU goes into C6 in, which is set by default to a state that is no longer available, thus breaking the top turbo bin.

B0D24F3xDC clear bits 9 and 10 (in english: on bus 0, device 24, function 3, offset 0xDC, make bits 9 and 10 equal to 0)

To then fix top turbo:

B0D24F3xA8 clear bits 30 and 31

These changes net a consistent 9-12% raw performance gain in multithreaded programs. In games the difference is actually more noticeable since without this fix the CPU will randomly drop as low as 1.6ghz for me, which is just flat out dumb and causes major stutter.

cinebench throttle fix vs no fix: http://i.imgur.com/Ov8Wkhk.jpg (this fix alone only gets to 2.27, not 2.29. I also lowered memory timings a little for the 2.29)

cpu only hits low 70s in P95 with this fix and an undervolt. Undervolt can be done with AmdMsrTweaker or manually with MSR writes.

do you have any guide on how to lock the cpu to 3.4 to 3.5 instead of 3.2 to 3.5?

thanks.