Intel Core 2 Quad Q6600 (Kentsfield) Random Reboots

[idata]

My computer reboots/restarts at random. I have not overclocked or updated bios. I've tried changing graphics card.

I've also been tracking temperate etc with CoreTemp and only thing out of the ordinary is that suddenly all processors jump from 1.6gHz to 2.4gHz, I loose my internet connection and the fan just about starts when the computer reboots. I've ordered a separate network-card to see if that helps. Any other ideas?

[idata]

Also.. I'm running Windows 7 RC 7100...

[idata]

The Windows 7 RC, expired, you need to upgrade to the final version, that is now programed to reboot all the time.

the jump from 1.6 to 2.4 is normal, the CPU adjust it's speed based on demand to give best balance of energy use and performance.

If your experiancing high cpu temperatures ensure the heat sink is mounted correctly and fan operates well.