stability issues with new computer

[Gamingfreak]

I just got my new computer set up and everything is on stock settings so i decided to run prime 95 just to check it was stable and it isn't, so i tried updating the bios and setting all the voltages to default in case it was messing those up somehow and its still not stable so whats goin on? I thought the E6600 and P5B deluxe motherboard were supposed to be rock solid stable for overclocking but if its not even stable at stock speeds theres no way i can overclock.

If you guys know anything that could be causing this please help me.

 

[freestyler105]

What are the temps? Sounds like your heatsink isn't on right or something.

 

[Gamingfreak]

cpu is usually around 40C idle and 50C max under load, ive tried reseating the heatsink but when i took it off it looked like it was making full contact because all the thermal paste was spread out

 

[Gamingfreak]

i found the problem, turns out i had the cpu voltage wrong since 1.135 and 1.35 looks very similar on the bios page and i had to scroll up a long way to get to the right voltage lol, but now my cpu is a lot hotter (56C under load right now) and i want to get a new heatsink for it. I had a scythe on my last cpu and it did pretty well, any suggestions?