well i've just gone out and bought a 3.6Ghz Prescott Processor on an Asus P5AD2 Premium Motherboard. The box it came in was a little different to what i was expecting as it says its got EM64T (and is boring black and white not orange and blue ), anyway have checked this on intel site and it is 64bit enabled. How do i go about enabling this then? It said on the box that the bios had to be 64bit enabled for the processor to work even in 32bit mode. Have updated my bios to the latest version but there don't seem to be any 64bit options in there but the pc does work fine. Obviously i'd need a 64bit operating system but any other ideas? Also as i have a prescott i'm obviously worried by the temp - gets up to 73C on stock fan when playing doom 3 and the intel site says 72.8C is the limit, but i haven't had any problems as of yet. Has anyone elses burnt out yet?