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Stable at 5GHz - Page 3

post #21 of 34
Quote:
Originally Posted by snelan View Post
So do you think I really need to keep giving it more VCore for 5GHz (as in it is only stable at 1.536V) or do I need to adjust something else. I have CPU-PLL at 1.96V. Is my chip just a bad chip?
CPU PLL is way too high, that is probably why.

1.78-1.84v should be enough.
post #22 of 34
Quote:
Originally Posted by Live_free View Post
You could also try dropping the v core bit by bit to see how low you can go at that clock then once it crashes a 1 hour IBT raise it back up and run stability test for 10 hours.
Remember no IBT on SB, Prime95 onry.
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post #23 of 34
Thread Starter 
Quote:
Originally Posted by SimpleTech View Post
CPU PLL is way too high, that is probably why.

1.78-1.84v should be enough.
So it would go unstable if the PLL is too high? Should I try 1.45VCore and 1.84V CPU-PLL?
    
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post #24 of 34
Quote:
Originally Posted by snelan;12056953 
So it would go unstable if the PLL is too high? Should I try 1.45VCore and 1.84V CPU-PLL?

Yes, too much voltage can lead to instability.
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post #25 of 34
Thread Starter 
Quote:
Originally Posted by tconroy135 View Post
Remember no IBT on SB, Prime95 onry.
I was using IBT to test for stability, should I not do that?
    
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post #26 of 34
Quote:
Originally Posted by snelan View Post
So it would go unstable if the PLL is too high? Should I try 1.45VCore and 1.84V CPU-PLL?
That's correct. There is a thread with a member mentioning that he was able to lower his CPU voltage by lowering CPU PLL.

Give it a try with those voltages, at most it would be unstable.
post #27 of 34
Thread Starter 
Quote:
Originally Posted by SimpleTech View Post
That's correct. There is a thread with a member mentioning that he was able to lower his CPU voltage by lowering CPU PLL.

Give it a try with those voltages, at most it would be unstable.
Tried in the range from 1.45VCore to 1.525VCore. At 1.525VCore though, the BSOD says "A clock interrupt was not received on a secondary processor within..." All other times it just said a hardware error was detected. I'm thinking that the clock interrupt might mean that I need to adjust something else besides VCore?

EDIT: All of this was at 1.84CPU-PLL
    
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post #28 of 34
Thread Starter 
Just read an article saying that higher BLCK takes higher Vcore. I have mine are 100.2MHz. Is that why I need so much voltage?
    
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post #29 of 34
Quote:
Originally Posted by snelan View Post
I was using IBT to test for stability, should I not do that?
Prime95 is much harder to pass with SB processors for some reason. I passed 20 passes of IBT, then blue screened during folding. I then tested with Prime95 and failed within 5 minutes. I pumped up voltage until I passed 2+ hours of prime, then I left my computer to fold for 24 hours and have had no bluescreens.

Quote:
Originally Posted by snelan View Post
Just read an article saying that higher BLCK takes higher Vcore. I have mine are 100.2MHz. Is that why I need so much voltage?
I've also read a lot that says keep BLCK should stay exactly at 100MHz. I'm not sure how true that is, but when people make bold statements like that I feel like I should at least let other people test it before I do.
    
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post #30 of 34
go for phase cooling dude if you want to go higher for better stable temps
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