Okay, I have just purchased a P4I875P Dragon2 v1.0 (soyo) motherboard and a 3.4EGHz OEM processor (prescott core - but not extreme edition) and I am rather new to installing pentium processors. I was just reading how people have problems with retail motherboards and OEM processors. Will the OEM processor work with my boxed motherboard? I am new to OEM products so if I have missed anything major I need to know about them please let me know.

Since I am new to installing these proccesors I could definitely use some sort of guide if anyone knows a good site I could go to for advice.

Also, the box suggests I have at least a 400-watt power supply under a fully loaded system. Is that really enough or should I upgrade to a 450-watt or perhaps even a 500w?
Components in my current computer that I was thinking of just swapping:
Radeon 9600xt
80 Gig Maxtor
SB Live! card (maybe)
For now 1 stick of DDR 400 (512mb)
Chassis Fan
2cdrom drives
A disk drive
CPU fan
Thanks a ton for any help
