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Stabalizing Bulldozer FX-8120 with Prime95???

post #1 of 15
Thread Starter 
I have overclocked my FX-8120 to 4.93Ghz and have gotten it stable there so far with voltage at 1.525v with just multiplyer because right now I am comparing two 8120's to see which of the two has the best performance. So I am just overclocking with multi right now.

When I overclock to 5.04Ghz and run Prime it test for like a minute or two then one or two of the workers will stop.

I have tried to up the voltage for the cpu to stabalize but no luck. I have upped it to almost 1.57v and still no go.

Then someone told me that when the workers stop working in Prime that it is most likely due to the NB or Ram and not the CPU. Is this correct? I currently do not have the Ram overclocked at all. I do have the CPU/NB at 1.375v.

He suggested that I raise the voltage of the NB to stabalize prime. Doe she mean the NB or CPU/NB voltage? Can anyone verify this? And if I do increase NB or CPU/NB voltage, how high should I up it?

Please leave detailed comments or suggestions. Any feedback is appreciated.

I would like to get stable at at least 5.0Ghz. How do I stabablize so workers wont stop when running Prime?

Please HELP!!!

Thanks
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post #2 of 15
Its the CPU/NB.

Go for (whats stock)? +0.05v, 0.1v, 0.2v.
post #3 of 15
Thread Starter 
Can anyone help me with this?

I just did another attempt and video taped it. I am uploading to youtube now and will post link when its done processing.

Please Help
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post #4 of 15
Can you post some more of your voltages please?

CPU, CPU/NB, NB, NBHT are the most important.
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post #5 of 15
Thread Starter 
I have done that in other thread that I jsut updated.

Bulldozer stable at 4.94Ghz running Prime 575 Watts or somethig like that.

I video taped my last overclock to show details. I am uploading right now but may take a little bit.

Check out other thread. should be close to the top of amd cpu forum list right now.
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post #6 of 15
how did you put CPU LLC and CPU/NB LLC??
post #7 of 15
Thread Starter 
Quote:
Originally Posted by MojoW View Post

how did you put CPU LLC and CPU/NB LLC??

I dont know what that is. What is CPU LLC and CPU/NB LLC? I know what CPU_PLL is? Well really I dont even know what that is. I know that there's a voltage setting for it but I dont know what its for.

If anyone can elaborate on what these things are that would be greatly appreciated.

Also, should I overclock CPU/NB frequency or HT Link frequency to try to stabablize workers stopping in Prime?

Please, any help will be greatly appreciated.

NEED HELP!!!

I have been able to get stable at 4.94Ghz at 1.525v but I cannot get stable at 5.02Ghz with upping the voltage all the way to 1.6v and the CPU/NB up to 1.5v

What am I doing wrong? I know that the voltages do not have to be that high. What needs to be done to get stable using prime at 5.02GHz?

I NEED HELP!!!
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post #8 of 15
Another test to try (if you haven't done so) is IntelBurnTest.
It will always have a special place in my overclocked heart. smile.gif

How long did you test your 4.93 GHz overclock with P95?
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post #9 of 15
Quote:
Originally Posted by Evil Penguin View Post

Another test to try (if you haven't done so) is IntelBurnTest.
It will always have a special place in my overclocked heart. smile.gif

How long did you test your 4.93 GHz overclock with P95?


 

Normally I would agree, but the Linpack performance of bulldozer is really low, I'm not sure how well it's stressing it. Plus linpacks only focus on the ram/FPU, which isn't what most people use.

 

 

OP is using mutli only, which means his IMC and ram shouldn't be stressed much more, if anymore, at stock as they are now at 5GHz... Assuming his ram, HTT, and CPUnb are all at "stock" and were stable before, I don't think stability will require more cpunb voltage.

    
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post #10 of 15
With the little time I had BD, IBT still worked fairly well for testing.
The performance was terrible, though.

Linpack still gives people a good general idea if the CPU is stable regardless of what they do.
wprime, P95 and IBT are what I use for CPU stress testing.
The older version of OCCT I use for GPU stress testing.
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