"Before we get into it though, we have to laugh at our power supply situation. When we started testing our Tri SLI setup with a 1000 Watt Zalman PSU, we ran into some problems. During the Canyon test on 3DMark06, the system would just shut down! - Since this would seem to resemble a power problem, it was time to pull out a HX 620 Watt and do a bit of ghetto modding to get the two power supplies working together. What we ended up doing is running one GTX 280 off the Corsair HX 620 PSU while the 1000 Watt took care of the other two cards and the rest of the system."
I think if you rock one of these high end space heater, you may need to move your computer out of the bed or study room. Even with a 320 to 350W GPU, I’ve observed my room temp getting warmer when gaming. The heat is getting dumped into the ambient no matter the cooler used, so unless you can redirect it straight out the room or window, I believe one should be able to stay nice and cosy in their room during winter without the need to switch on the heater.