[QUOTE=alitayyab;3323360]I have had this board (Asus P5b-Deluxe Rev 1.03G) for about 2 years. the problem i am going to describe has been there for about 8 months.
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I would first think Power Supply, but you have a good one. And, you said you checked it. Do you ever run a program like Everest that post the core volts and rails. There is a good Vdroop with this board. I run the CPU at the high end of the specs.

What about the sound card? Did you ever test it without it?

I will go i7 eventually also. Just want the prices and the tech to mature a little.