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i7 2600k voltage question

post #1 of 7
Thread Starter 
Hey guys,

I just built a new rig with the i7 2600k and its sitting under a Silver Arrow. I did a mild overclock to 4.2 GHz and the voltage @ 1.2V. I noticed the voltage seems to stay fixed at 1.20 Volts whether its doing work at 4.2 Ghz or idling at 1.6 Ghz. This is probably because I used the Fixed Voltage setting under the BIOS. I tried using offset but a minute increase of 0.005V+ made the CPU go to 1.30 V which is not required. I ran the Intel Burn Test @ very high + Prime95 Small FFT's + kept looping a 1080p video and it did not BSOD. It did BSOD when i was running 1.18V after trying to do all the above so I had to increase volts. I tried enabling the EPU and putting extreme Power savings in the BIOS but that did not do anything. I did not install AI Suite II - so maybe that might help?. Also, I have the problem of being unable to recover from sleep because of that PLL voltage setting. If I set the PLL overvolt to disabled - can I still run this overclock or will I have to add more voltage.

In conclusion:
Can I get the voltage varying with the load?
Will I have to compensate by adding more voltage by disabling the PLL overvolt in order to resume from sleep?

Thanks guys.

P.S. Bios Revision is 1503 (sorry if i made a mistake on the last digit)
Edited by .Cerberus - 6/10/11 at 8:31pm
post #2 of 7
You can, use a - offset voltage.
BE VERY CAREFUL to check everytime you change your voltages in the bios. Because there is a bug while changing profiles in offset mode it can go +.9 volts, and instantly kill your cpu.

You may want to browse around and see if this has been fixed in the latest bios, if so I would update.
    
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post #3 of 7
You do not need PLL Overvolt enabled for such a modest OC, it is normally only required for 4.8 and above, depending on the chip. AI suite II would not make a difference, just keep manually messing with the setting and you should find your sweet spot for that OC.
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post #4 of 7
Thread Starter 
also wanted to add, I have TPU and EPU chip switches on my board which I did not touch when I installed, they are in their default position
post #5 of 7
Thread Starter 
thanks for the advice Omega and pirate +rep to you both
post #6 of 7
Thread Starter 
do i need to change the position of the switches on the EPU and TPU or something?
post #7 of 7
i know this chip pretty well , ran tons of hours on prime for my 4.5OC and my 4.8OC, all with manual voltage , i have never messed with offset so i cant really help you there , sorry bud.

Although even with manual set voltage it will vary a few fractions up and down of your set voltage in BIOS,when idling and under load, either synthetic or everyday use loads.

EDIT:sorry not familiar with the switches you are mentioning either

EDIT: Saw some videos on the TPU and EPU switches, for the OC it would probably be a good idea to keep them off, also make sure all your power management functions are also turned on , they wont make a difference in your OC stability, EIST etc.
Edited by sockpirate - 6/11/11 at 12:33pm
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