You'll have to make sure the CPU card really fits in them if you get any, I had two on an old PC mobo and the capacitators on the G4 card are in the way so I can't use them on both sides, only one.

BTW, it's a real shame they soldered the fan to the card, since mine has been making noise 4 times so far, that's about once a week. By making noise I mean that it got unstable or dusty (or whatever it is that makes them go wild). So I really want to replace the fan, but obviously you void the warranty if you do =( Such a dilemma...