I'm building a computer from scratch for my mother-in-law and i've never run into this problem before.

I have a D865PERC mboard and 3.0E GHz processor. I bought a case from antec that came with a 350watt powersupply. After i connected everything, nothing turned on except the fans. I checked the RAM and verified my mboard supported 1MB L2 Cache.

I then swapped out CPU's and replaced it with my old 2.4GHz cpu. Everything worked perfectly. Using the 2.4ghz cpu, i updated the bios drivers to the most current one for the mboard then swapped out the CPU again. Still nothing, no power to my keyboard/monitor. I hear no activity in my hdd.

Could the problem be with the powersupply? Not sure if a 350watt P/S can handle 2 fans and a 3.0GHz processor. Any ideas?

Thanks