After I installed the e6700 , the cpu fan would start but pc will not boot. I tried clearing the c mos and taking the mobo battery out to no avail. Both Cpus are from the same chipset. Not sure if its a power issue. my PSU is 285w max, I'm also running a Geforce GT 430 GPU. It still won't boot when I unplugged the GPU. Please help! Thanks!!