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Try for 5 GHz? - Page 4

post #31 of 42
With my Asus P67 Pro early bios version, I only needed 1.42v to hit 5GHz, with the newer bios I needed 1.48 with temps in the 80's.

I've since swapped to a Sabertooth with vcore of 1.38 and 4.8GHz 24/7. Temps under load are in the mid 70's with ambient at 26c on air. I won't run it long with vcore >1.4v though.
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post #32 of 42
For my chip to break 5ghz i could use 1.5 - 1.6v without success, That is until i turn up the pll overvoltage to 1.89v, Now 5ghz stable @ 1.475v
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post #33 of 42
Quote:
Originally Posted by Chewy View Post
For my chip to break 5ghz i could use 1.5 - 1.6v without success, That is until i turn up the pll overvoltage to 1.89v, Now 5ghz stable @ 1.475v
Is PLL voltage. The PLL overvoltage is a different thing. How strange is PLL voltage effect on a system. Some lower PLL to get lower vcore a other raise it to gain stability.

I will raise it to 1.89 and try to get 4.6 at 1.34 later....
post #34 of 42
Quote:
Originally Posted by munaim1 View Post
okay. I can do 5.1ghz with 1.47vcore with temps below 70c
Three can play at that game. 5.3 with 1.47v with temps below 60.

But in all seriousness op, every chip is different. You're best finding out what yours can do, just don't exceed 72 degrees or 1.5v.
post #35 of 42
Quote:
Originally Posted by cba1986 View Post
Is PLL voltage. The PLL overvoltage is a different thing. How strange is PLL voltage effect on a system. Some lower PLL to get lower vcore a other raise it to gain stability.

I will raise it to 1.89 and try to get 4.6 at 1.34 later....
Yeah i meant with 1.5 - 1.6v vcore my cpu would not go over 4.8ghz no matter how much vcore i gave it. But increasing my PLL overvoltage to around 1.89v enabled me to cross the 5ghz barrier.
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post #36 of 42
If raising PLL allow me to run 4.6 at 1.34. It would be very good. i will give it a try.
post #37 of 42
Quote:
Originally Posted by cba1986 View Post
If raising PLL allow me to run 4.6 at 1.34. It would be very good. i will give it a try.
What have you raised the PLL to?
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post #38 of 42
try it...RMA it if fails...Try again...
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post #39 of 42
Quote:
Originally Posted by munaim1 View Post
What have you raised the PLL to?
For now. To nothing. I'm at work. But i will try 1.89 or 1.90. And go for 4.6 at 1.34. Now i'm at 4.5 at 1.34 but at 4.6 prime fails after the second test..
It worked at lower OC at 1.85 with 0x124 to gain some stability.
post #40 of 42
My 2600k was stable at 4.8ghz with 1.375v HT on. For 5ghz I needed 1.550v. Moving my PLL voltage down to 1.74v let me drop to 1.525v stable. Going up didn't help me at all.
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