I bought one of the above computers not too long ago-it was cheap, and I wanted a 15" Intel Mac to finish up work on my master's thesis. In any case, I know that these have known GPU issues that-from what I've read-seem to be heat related. I installed "Macs Fan Control" and had it tie the fan speed to the GPU temperature. It will start to increase the fan speed(both fans) when the GPU hits 100ºF, and will hit the fan maximum speed when the GPU hits 130ºF. So far, it seems to at least be keeping the temperature under 130ºF(it's at 126º at the moment). I'm still wondering if this is on the warm side, though. As a secondary question to that, with a GPU temperature of 126º, the heatsink is at 109ºF. In addition, the CPU is running at 109ºF with the heatsinks around 100º. I'm guessing that the temperature difference is indicative that I need to do a repaste. Looking at the iFixit guide, I don't think it's anything beyond my skill level, but also don't want to attempt it until I'm completely finished with my thesis(which will hopefully be tomorrow). Does anyone have any thoughts or information about what would be "dangerous" temperatures for the GPU? In addition, with the discrepancy in GPU and heatsink temperature that I'm seeing, should I take the time to repaste it?