I just intalled one on a Sapphire ATI Crossfire mobo. *EDIT* The fins do clear the ram slots 1 & 2 ...(I'm not sure if a ram stick could fit in slot 1). The fins partly blocks the cpu fan connector (between the fins and the blue ram sockets is the beige thingy) and the 8 pin 12V power connector (thick black cable at the top of the Noctua case fan). Also if I install a fan (a Antec P150 case), the frame of the fan will be touching and pushing down on the ram in slots 3 & 4. I've left the fan off for now and the temps are the same as before on a socket 939 3700+.
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