Can't get stable at 3.6gmhz

Problem I find so far using kents for P5K deluxe.

I have problem hitting 450 x 8 (3.6gmhz) stable.. it always shut itself off less than 1hr of small FFT using prime95. I have no problem on 450 x 7 or 475 x 6 while priming...i tried higher vcore but still the same


CPU has been running 450 x 8 on my asus commando prime stable (at least 8hrs) and 475 x 8 for bench..my current P5K deluxe can't even allow me to boot 475 x 8 with the same vcore or higher that I set for my commando.

anyone manage to get it stable with kents on 3.6 with this mobo?