Same thing happened to my Q66. Started acting funny, but I thought it was the board because CMOS would always reset itself. So I replaced the board and still no luck come to find it was my proc. I phoned up Intel and they were like..."we kant help u cuz u dint buy yo proc in a reetale bocks." Tiger replaced it, even though it was overclocked to 3.2Ghz and I was 7 months outside my 30-day return policy. AND on top of their "opened processor box is not returnable" policy. That's why I love Tiger. Anyways, The likelihood of it being your processor is like 95%.