FX-8320 Turbo Core overclocking help

[RIfishman]

I have a FX-8320 at 4.2 GHz with 1.38v stable. What I want is to have Turbo Core enabled and overclocked (so I could potentially have say 4.6 GHz on half of my cores stable for single threaded apps). People have apparently managed to do this and I found a nifty little tool to change the P-states to do so called AmdMsrTweaker but the problem is even when I tweak the half load turbo P-state, it will never kick into gear. I have Turbo Core enabled, APM, all that stuff needed. Anyone have experience with this or know what might be the issue?

 

[Erenhardt]

I have mine fx8300 configured to run at 4.4 and turbo to 4.5 using amdmsrtweaker.
Here is my param line:
p0=22.5@1.45 p1=22@1.425 p2=22@1.425 p3=22@1.425 p4=21@1.4

I configured it this way to aviod throttling. Careful! My voltage is high because my motherboard doesn't support loadline calibration. My Vcore drops to 1.33 under load on the actual CPU sensor.


PS. You can schedule task that will automaticly execute amdmsrtweaker each system startup.

 

[Schmide]

Motherboard? Please report. The chip will prob go as far as you can get it, the real question with Vishera is can your motherboard supply the power?

 

[RIfishman]

I have mine fx8300 configured to run at 4.4 and turbo to 4.5 using amdmsrtweaker.
Here is my param line:
p0=22.5@1.45 p1=22@1.425 p2=22@1.425 p3=22@1.425 p4=21@1.4

I configured it this way to aviod throttling. Careful! My voltage is high because my motherboard doesn't support loadline calibration. My Vcore drops to 1.33 under load on the actual CPU sensor.


PS. You can schedule task that will automaticly execute amdmsrtweaker each system startup.

That's just the thing. The turbo core clock speed on half load (The P0 state) will go into effect but on all cores instead of half of the cores like it should which is not what I want as the speed I set for the P0 state is not stable on all cores but may be for half load so I'll see a boost in single threaded apps while still being stable when using all cores.

 

[RIfishman]

Motherboard? Please report. The chip will prob go as far as you can get it, the real question with Vishera is can your motherboard supply the power?

Whoops, completely forgot to list that. Its a Sabertooth 990FX R2.0.

 

[Schmide]

Well that makes my point moot.

 

[rancherlee]

How old is your chip? 4.2 seems at 1.38v seems a bit low unless it's an early chip or a really bad one. I had no luck playing around with P-states on mine to get Turbo working properly but my early 14' 8320 runs 4.5 @ default 1.35v (with line load cranked up to hold that voltage)so I disabled turbo all together. I had a 4.8 @ 1.45 turbo on it but it had strange jumping around between states causing stuttering in games.

 

[RIfishman]

How old is your chip? 4.2 seems at 1.38v seems a bit low unless it's an early chip or a really bad one. I had no luck playing around with P-states on mine to get Turbo working properly but my early 14' 8320 runs 4.5 @ default 1.35v (with line load cranked up to hold that voltage)so I disabled turbo all together. I had a 4.8 @ 1.45 turbo on it but it had strange jumping around between states causing stuttering in games.

I've had it since Feb 2013. Not really comfy pushing past 1.425v and at that voltage 4.2 was the max I could get stable on all cores. Anything lower then 1.38v at 4.2 is unstable on all cores.