I have the ATI Radeon 3870 X2 and i was fooling around with the ATI Overdrive and i was playing crysis at the same time so i could see what the temperature was going to be like and stuff and the first GPU was like 80% active at like 75 degrees celsius. so i switched to the second gpu and it was 0% active and at like 44 degrees celsius. Does that mean it is not being used?