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Just installed my new GTX780Ti, downloaded the new drivers only to find my GPU usage on both my 460 which is for PhysX and my new 780Ti to be all over the place when moving from page to page. Currently, I'm seeing a 3% GPU usage on my 460 which is powering my 2nd monitor and 0% on my 780Ti which is powering my main monitor. However, if I start going backwards and forwards between applications and webpages, both cards see the GPU usage increase. What the hell is going on?