Not enough volts? (Cold boot problem)

adamgwsmith · 1 Sep 2013 at 13:58

The problem I have is that about 1 in every 5 times I boot my PC from a cold start it shuts down after only a couple of seconds then restarts itself to a black screen - doesn't even get as far as the BIOS screen.

I have my 2500k overclocked to 4.8Ghz. I have my core CPU voltage fixed at 1.385v. Once booted my overclock is completely stable with no issues.

I recently upgraded my PSU to a Corsair AX860 - so that should be enough to power my system (I was having the same problem on my old Corsair 750).

Any ideas as to how to fix this?

wazza300 · 1 Sep 2013 at 14:00

maybe a touch more dram v and vtt voltage?

adamgwsmith · 1 Sep 2013 at 14:03

OK, thanks for the info.

How much extra would be a good/safe starting point?

wazza300 · 1 Sep 2013 at 14:07

id go one or two clicks above 1.65v for dram and max safe on imc voltage is 1.2v

id try around 1.10-1.15v for imc

if it doesn't cure it though id put dram back to 1.65v

adamgwsmith · 1 Sep 2013 at 14:18

Cool - thanks for the advice.

I've changed the settings so hopefully that will do the trick.

Thanks again!

adamgwsmith · 2 Sep 2013 at 17:45

OK - so first cold boot after changing my settings and the same problem: shuts down after a few seconds then restarts to a black screen . .

Any other possibilities?

wazza300 · 2 Sep 2013 at 18:23

are you using the very latest bios for your mb? could be a bios bug with the 770 gpu?