Is 3Dmark06 to be trusted...?

[Automata]

Nope

Something is seriously wrong then. Can you submit the results online and link them? We won't be able to help much without that information.

 

[TerraPhantm]

You don't have anything like AA/AF turned on do you? Might seem like a stupid question, but sometimes it's just the simple things that are wrong.

 

[Douken]

The unstable OC theory is true, I think that I got a 10 fps boost getting to Stock 2.1GHz from 2.65GHz, then I OC'd to 2.5GHz and everything is ok now.