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Do I need to enable Internal PLL overvoltage for 4.7Ghz??

post #1 of 5
Thread Starter 
With a 2600K?

Also after enabling do I need to up the PLL voltage? or just enabling is enough?

Thanks.
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Pride and Joy
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post #2 of 5
If you're content and fully stable with the voltage you chose you shouldn't need to.
The Wtfer
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The Wtfer
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post #3 of 5
PLL voltage is NOT related in way to PLL Overvoltage. PLL Overvoltage somehow unlocks higher frequencies (not really multipliers but frequencies, as you will run into the same wall if you tried raising BCLK to pass the same mhz) so you gain about 5 higher multiplier levels overall. The problem is, Intel isn't saying exactly how PLL Overvoltage works, and it didnt work in the B1 stepping cpu's. PLL Voltage, however, is the voltage of the clock generator. Turning on PLL Overvoltage does NOT change the PLL voltage, even though it sounds like it does.

Also, since the "wall" is frequency, not multiplier related, you may find that you can boot at a certain mhz but be wildly unstable without PLL overvoltage (regardless of vcore), while on a different CPU, the board will simply fail to POST and say overclock failed.

My CPU seems to have a wall around 4950 mhz. Tried passing that by using BCLK at a BCLK level which was tested working at lower cpu speed (I think I did 101x49, and got the same overclock failed as doing 50x100, while 49x100 was perfectly stable (at the correct vcore).
Edited by Falkentyne - 5/28/11 at 3:32am
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post #4 of 5
For me enabling pll overvoltage @ 4.6ghz to 1.88v let's me lower my vcore substantially

It works for some chpis and doesn't for others i suppose you won't find out untill you try
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post #5 of 5
Enabling "PLL overvoltage to 1.88v?"
Those are two different settings. You talking about PLL voltage and PLL overvoltage?
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