I am going to get a DFI mobo soon, and it's a steal - 95$ for AM2 with SLI (when the chip is modded to an NF4 SLI, or softmodded)..... HOWEVER - it has this pathetic little fan on the northbridge - i want to replace it. I am going to replace it with this heatsink... ok and all.... BUT - while I know about CPU thermal paste application/removal i know nothing about northbridge thermal paste. Can i still use AS5? How much of it? How do i take off the thermal paste that was on there before?