Which board did you buy? Cheap board + good chipset still = crap.
I had problems with my first P35 board that were no fault of the board (and certainly not the chipset). I tried to get by with a cheap case when I built this rig and it ended up biting me in the butt. The case I bought was so cheap it didn't even have proper mounting holes, so the board saw a lot of tension strain over its few short months of service. I ended up swapping for another P35 board and everything is hunky-dory now. Overclocking with 3 and 4 series chipsets is a breeze, too.
SLow response, but it was an ASUS P5B-VM.