I have a late 2006 20" iMac, with, as you might guess, toasted graphics. The computer still works, but it is in its early stages of dying due to a bad graphics processor. It has the ATi X1600 processor which is known for its problems. The computer will occasionally freeze, reboot or shut down for no apparent reason and there are occasional graphical anomalies which have become a bit more frequent since I bought it for $200. This is what I want to know: Is it at all possible to replace the GPU with a different one? I know it is a soldered processor, rather than the slotted GPU that can be found on the 24", but removing it shouldn't be an issue, unless Apple did some strange work on it. If it can be desoldered without any issue, can a different GPU be resoldered in place of the original? If not, is there a way to flash/modify the iMac firmware to make it work? If it wouldn't work at all, can I put in a new ATi X1600 GPU? Would reflowing the GPU work to solve issues? I know that this issue is heat aggravated, so using smcFanControl helps, but it won't help forever. I would like some answers so I don't end up permanently destroying the computer. I also don't want to replace the logic board all together because it isn't worth it. Now, here's another idea. Would I be able to put in regular PC hardware (such as from a laptop) into the body of the iMac and use it as a Hackintosh in a case? I'm well aware that the hardware would have to be very specific for this, and may not even be feasible, but I would like to discuss it.