if it's a good 750w psu you should have 60amps which should have plenty of headroom. You really don't state if it needs to run 5ghz daily or for a suicide run. I'm telling you thats going to be hard daily.
I said 5GHz was my goal, but with the 1.45v limitation and such.. I may want to jack it down to 4.5Ghz daily (4GHz if I really have to )... but I kinda need to get it to 5GHz for the presentation.. HOPEFULLY I can.
Wolfdales cant take as high a voltage because of the smaller process they are made at, but they don't need to run at as high a voltage as a conroe anyways. The first Pentiums ran at 3 volts.
With WC, a good mobo and good ram you can get 5Ghz.