I have an Alienware m17x r3 with an AMD Radeon 6990M graphics card. I can load the GPU to 100% and leave it long periods of time without exceeding 75 degrees celsius. I can play crisis without any issues whatsoever. The weird thing is, if I plug it into an external monitor and try to run both the laptop screen and the external monitor (both 1080p, if that matters) even on a static screen (web browser window or desktop) the graphics card rapidly heats up. It easily breaks 100 degrees celsius and the computer shuts off. If, before the computer shuts off, I tell it to run only one of the two displays, the temp rapidly falls to about 55-60ish. GPU load is 0-5% the entire time. The clock does move from 100 mhz with one monitor to 200 (or maybe 250, I can't remember) with 2. What causes this?