I have 2 XFX 6600gt's on SLI, These cards are EXTREMELY LOUD so much so that i can hear them even while i am vacuuming. It is getting extremely annoying at this stage and am looking for a quieter solution. I also have a AMD 3500+ which has a 1kg copper Heatsink with 1 fan(option of 2), their is also a case fan, Both these fans are loud but are being replaced with Akasa Ultra Quiet AK-182-L2B. There is also 2 fans that came with my case but these are fairly quiet. Please say someone has a different cooling solution to my graphics cards. there is no longer a warranty so i do not mind replacing the fans.