Random shutdowns at 4.2ghz.

[dave343]

So I though I would see how far a Pentium D 945 I had would go. Got it into windows at 4.2ghz playing rainbow six vegas. Problem is I'm getting random shutdowns in windows and sometimes during bootup. I have left on the stock intel heatsink because I wanted to see how far I could get with the CPU. My temps of course are high, VERY high like in the 60's but I'm changing that today I just wanted to see what I could get from the cpu. My question is, are the random shutdowns because of my temps or the cpu Voltage?
At4.2ghz, the voltage is at stock, PCI-e is locked at 100, PCI locked at 33, ram running at 480 I believe, might be a little higher.

Also at 4.2ghz what is this equiv too? Is it on par with an X2 3800+ or maybe even a e6300?

 

[~LoKe]

Voooooooooooooooltaaaaaaage!

 

[Arcygenical]

Voltage or just general instability.