h-ig41-uatx

I have an old HP p6710t. Upgraded to: Samsung SSD, 4 GB RAM, E5800 processor. Don't want to spend too much on it, just get the max out of it. Tried an E 8600, it did not boot. (1 short, 1 long beep) I'm a little scared of QUAD core (95 W) or BIOS update (HP does not support any updates or help...