I've had Voodoo3 2000, MicroStar TNT2, and Elsa Erazor TNT2 Ultra cards that have good heatsinks but either crappy fans or nothing but glue between the heatsink and the chip. With the MicroStar TNT2 and the Elsa Erazor card, I've taken the heatsink off using dental floss, put some thermal compound surronded by a very fine line of super glue and mounted the heatsink on the chip like that. Then, I lightly glued cheap $8.99 4500 rpm fans on the heatsinks. Had to take the cards back, though, so I just popped off the fans from the heatsinks and put the old ones back on.. No one ever knew about the heatsinks.