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I don't know what happened here. I'm running dual HD 7950, it usually share same usage, but today i notice that the gpu1 usuage is online around 50% wile the second always stay at 99%. This does not happen when i don't play game, if i watch video or just let the PC idle, everything will be good. But everytime i play a game, GPU2 always has the highest usage, even when i alt+tab out of the game, the GPU1 will drop to 0% while the GPU2 stuck at 99%. Any idea?