Could it be the bios? Could it be that p5k doesn't like OCZ ?
Could it be too much vdimm?

I've been running 0311 with my crucial on 1200 @2.3v i think their starting to go the same way. had been playing on fri pm with dram static read control. Wouldn't post until i removed a module from slot nearest 24pin power. Added module back & away i went again @1000. Flashed to 0501 & the same thing happened trying 1200. My memory has always hd good cooling but it shows that the voltage can still get it over time i guess.

luck