skidmarek

Hi there Guys

In case there's someone out there that wants an idiot-proof step by step guide of Kenglish's fix I've Made one and worked it into one picture:

Enjoy!

Hi Gx60 Owners,

Kenglish's Method Gives the GX60/70 A great boost so in order to simplify the method for beginners I've Described the entire process with one Image, Enjoy!

Hey Kenglish

We're trying out your method now and on the a10-5750m the cinebench improvement is impressive as you can see.

The improvement is a little harder to see in games though, with it the cores basically all stay locked at 3.2Ghz, when idiling I see the first two occasionally bump up to 3.5ghz but not when used.

Do you know if there's anyway to lock say two cores at 3.5ghz and two at 3.2Ghz?

Thanks Kenglish

I've posted your methods at the *The Offical MSI GX60 Owners Lounge* - Page 277 (referenced to you of course) and early results are quite positive.

Thanks again for all the help! you seem to be the only one on the internet who has all this knowledge so we're very lucky to have you share it with us

Hey Khenglish

Just wondering if you could share your insight and skills for us gx60/70 owners to clarify your methods to lock CPU p state that you described in: http://forum.techinferno.com/msi/4384-msi-gx60-laptop-overclock.html

Thanks in advance

p.s. I would PM you but can't figure out how >.< If you get round to it reply in that topic

You can lock the CPU to never run slower than 2.7ghz, but as for actual overclocking that is not possible (unless AMD reference clock documentation gets leaked).

How to lock to 2.7ghz and 3.2ghz:

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.

This multiplier lock does cause problems when the IGP is active since the CPU will try to exceed its TDP, which does not work. This causes stuttering in games, but for pure CPU tasks this works fine. I'm trying to figure out how to get the CPU to recalculate power draw after lowering the voltage to prevent this stutter.

*The Offical MSI GX60 Owners Lounge* - Page 266

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.

Hi there Khenglish

Would you be able to expand a little on the overclock you described above? None of the methods you described above are known about on all the other GX60/70 forums so I'd like to flesh them out because we are in desperate need of giving our CPU a boost!

I own the GX60 with the a10-5750m and admit I'm not the most capable over clocker..

Firstly you described the "cinebench throttle fix" which netted you a 5% boost, but I can't find reference anywhere to what the fix actually is?

Secondly what system did you test the changes with BAR-EDIT with? because different APU's are locked to different degrees and the a10-5750m seems quite touchy (a lot of people have bricked theirs with fiddling with bios and etc) So mostly I was hoping for a pretty basic step by step to arrive at that point and also just if you could shed some light on the potential to break things? Same goes of the AmdMsrTweaker..

I realise it is a lot that I'm asking for but there is a whole community for gx60/70 owners that are desperately searching for ways to squeeze more out of our APU's, you seem to have some of the answers so if you can make it a little more fool proof I can pass it on in the other user lounges etc (If you look here *The Offical MSI GX60 Owners Lounge* - Page 266 You'll see that people are starting to give up and sell their GX60s!)

..

Thanks in advance man, you're a legend!