if you're gonna be running high voltages to a CPU, the load will probably cause the mosfets on the board to get hot. i would get a HS from somewhere (stock AMD HS would work) and chop it up so it fits on the mosfetas nicely. then with some thermal epoxy mixed with AS3, glue it on there. (to the mosfetrs) and then get a nice cooler on the NB, and sometimes you can put the stock NB cooler onto the SB, wit little mod to it. especially if you're gonna do a VDD mod, you'll need NB cooling.
and also you can poke around on chips on the board feeling for hot ones. if they're hot, get a little HS on them. what i did to one board thats gone now. i need to get my asus running once again, then do it o it... or sell/trade it......