Overclocking 'Presets' causing immediate shutdown?

[TheJamsh]

Hey all,

I recently bit the bullet and decided to boot up my new PC with the 4.2 Ghz OC setting given to me in the BIOS of my Asrock Extreme 4 x79 Motherboard. Everything booted just fine, but 2-3 minutes later, instant shut down. It was doing nothing special, just sat at desktop.

I'm using a Core-i7 3820, which normally runs at 3.6 Ghz (Still can't figure out how to make the 3.9Ghz setting stay on all the time). It's cooled with a Corsair H80. Anything blisteringly obvious that I'm doing wrong?

It's pretty quick anyway. Hyper Pi calculated to 1M decimal places in 15.29 seconds, which by the look of the scores I've seen is pretty damn fast. Always eager to get more out of her though...

Any pointers or tips? I haven't touched OCing before, haven't really had a need for it

 

[SirConfused]

Generally the pre-set OC's won't have optimal settings so your shutdown is probably just as simple as an unstable overclock. First thing you want to do is manually set all the voltages to what they want to be (for a low OC like yours nudge the vcore up a few notches), check the ram timings and speed aren't being set to something stupid that your set can't handle and then give it another try.

Once you get it stable then you can look at increasing the clock speed and do what's necessary to keep it stable from there.

As for the 3.9 i'm not sure what you mean by that, the only thing I can guess is that you're talking about the turbo boost feature. If it is that then you probably want to turn it off if you're going to be OC'ing as getting a stable clock and having the chip crank itself a few hundred mhz higher isn't exactly optimal .

 

[j.col]

as Sirconfused said, manually set the cpu voltage, just try raising it a couple of levels and try it.
then stress test it with intel burn test, at max ram for 10 passes