Anybody have ideas on a good gpu (graphics card) cooler/fan for the iMac Intel's x1600? I want to use ATITools to oc this baby (like many others have done), since it's only clocked at 310/300 (on my 17" imac), but I'm afraid the cooling's not adequate. If you look at Kodawarisan's dissection of the iMac, the x1600 is only cooled by a dinky, little white passive heatsink http://www.kodawarisan.com/imac_intel/0114110.jpg. So, any suggestions on a very slim and small (but adequate) fan/heatsink? It would have to be < 1cm (10mm) thick.