I might do one last graphics card swap on my 2009 Pro. I have the ATI 5770 which is nearly silent. I learned a trick which is that from a cold boot the graphics fan is audible, but if I immediately do a reboot it is silent which I like. Anyhow I am considering either EVGA GeForce GTX 680 Mac Edition Sapphire HD 7950 3GB The two new cards basically. Any thoughts on noise and relative performance?