i was reading up on the p5 today wile drinking coffeee n paintin me door and the one thing that stood out was complaints from the memorey controller/mem frequeny
seems the board dosent like high ram
A future BIOS revision should also address the memory glitches we suffered, as the P5KC was a terror when trying to run memory at high frequencies. We had to use the Auto setting with both DDR2 and DDR3, as trying to use the 1,066MHz of our Corsair XMS2 PC2-8500 - or even the 1,333MHz setting we tried with the Patriot PC3-15000 (1,866MHz) - made the system hang at POST. On one occasion, we had to use Vista's excellent MBR repairer,
TAKE NOTE HERE ICEY as the memory controller messed up the boot procedure. Stock tests therefore had to be conducted with the DDR2 at 800MHz and the DDR3 at 1,066MHz.
there other thing but most point to running it lower/default to get the board stable

to me they sold somthing that dosent do what it says to a degree
many of the articles i read n forum posts heres the one that basically says it all and sorts the issue out
seems it does need a bios update but will never get one as there old hat now so generic ram/ timings seem to be the order of the day for it
http://www.bit-tech.net/custompc/review ... -p5kc.html
best bet stick some generic ram in sell it
ill buy it
