That is the very first thing I did, but did not help. Wasn't very dirty anyway. From what I can see it loooks like the GPU & CPU share the same heatsink/fan. But it looks like the GPU is downstream from the CPU. WTF?! I installed TPFanControl to override the BIOS settings a long time ago. Was able to get the fan up anther 1500RPM to help with the cooling. But like I said, it may be memory related, just not sure if it's system or GPU memory. Hopefully I can get the 2 of them into 1 stable one. Eventually I will propbably have to give it up. But my boss is very generous, so if there is no need for it in the company anywhere (and there is doubt of it's reliability) he may let me keep it.