Mysterious OC problem?

[Spider-Vice]

So while I can't get my new PC, I've overclocked my Q6600 to 3.0 Ghz, but that's about it, if I increase it, it won't boot at all, and the motherboard won't even do the 3 boot tries (Gigabyte), it'll restart manically. Not the PSU as it happened with 2 different ones.
I think it might be the mobo as it does kind of a hissing noise when the CPU is loaded, even more with the OC applied.
But the mysterious thing is, when I run IntelBurnTest, it restarts after a bit, and it's not heat, as temperatures don't go even close to TjMax. Increasing the voltage a notch doesn't help but add a bit more hissing. It never hurt my mobo but I was looking for input, to see if it could be either the mobo or the CPU.

Without stress testing it never crashes.

 

[de.das.dude]

check the core voltage graph with some utility. the VRM on the motherboard is gone for good.
if you see drops in voltage with stressing, then you'll be sure.

usually leaking capacitors make a hissing noise. but yours is solid caps so it must be something else.

sidenote. that board is NOT meant for ANY sort of OVERCLOCKING at all.

 

[Spider-Vice]

Hehe, thanks for the input. I expected an answer like that, the board is a pretty budget one because my ASUS P5B-SE had died and it was more of a replacement.
It hisses a lot more while Intel BurnTest is going. Doing a few seconds of BurnTest makes the voltage go to 1,216V which is basically stock, sometimes drops for a second to 1,200. While it's idle it varies a lot because I have EIST and C1E on. Though 1,232 is max even while idle.

 

[DarkOCean]

I wouldnt do any oc on that board, especially with a 65nm quad core! it a low end mobo(only 3 power phases) you may have an unpleasant surprise like blowing up the vrms.

 

[Spider-Vice]

Ok, got it, didn't know it was so technically limited I guess, thanks