q6600 problem

[lanzarobbie]

Hi ive brought a q6600 off of bay and have had problems with the pc rebooting,and stuttering in bc2 and mw2

i removed my killer pro and all seemed ok so ive put it back in and managed 3 rounds of bc2 last night without a problem, so i thought everything was okay again.

This morning i ran a 3d mark vantage test and the pc froze?

the cpu is at stock, do you think i should ask for a refund as it seems to be unstable.

the cpu was sold as semi-new but it is dated 07 on ihs.

 

[lanzarobbie]

bios is latest temps are 35c, i have water cooling,everything in the bios is default,there is no 8 pin on this board, only a 24 pin and 4 pin.
i moved jumper to reset cmos.

when i brought it,i tried it at stock on a few games then tried to overclock it but couldnt get it stable, games started jerking so i went back to defaults in the bios, but i only went up to 1.46 v core