Can anyone direct me to the technical information about the exact fan used in the 5,1 expansion bay? Specifically the size, amount of air moved, noise and max rpms? The reason I am asking is that I am having issues with removing the heat from my 7950 and want to look at ways of improving the cooling in that bay. I am aware that all the Apple fans are proprietary and use the 4th pin as a speed adjuster by varying the voltage. If you put a standard PWM fan in place of any of the Apple fans it will just run at 100% but there are reports of PWM fans being quieter at 100% than the official fans. My GPU is a flashed Sapphire 7950 Flex OC with Boost and it dumps the majority of its heat into the PCI bay and relies on the case fans to vent that heat. The PCI bay is correctly detecting all the heat and ramping up to get rid of it and the noise is intrusive. It isn't the GPU fans making the noise because GPU-Z reports 74C and 62% on the card. If I set the GPU fans manually to 62% they are not really audible and certainly not over the PCI bay fan. I would also like to know if the Apple fan holder can be disassembled easily to get at the fan. I know how to get the holder out of the case for cleaning but can't work out how it is all held together. Thanks in advance, Daniel.