I just installed the GPU3 client to test my GTX 560 CUDA capability and perhaps set my computer up for some minor folding duty as well. However, whenever the client is actually doing work, my graphics card makes a high pitched whirring noise, it's not the fan it's some other part of the card. I'm certain the noise does not come from the PSU, I have the side of the case open and it's coming straight from the middle. If I configure the client to use 100% of processing capability and then watch the viewer, I see the bar sliding all the time and I also hear the noise all the time. However, if I set the client at anything below 100%, say, 50%, then I see the slider move some of the time, and exactly at the moment that it moves, I hear the whirring sound, and as soon as the slider pauses, I don't hear the sound. This does not happen with any other application I've tested, i.e. games, Heaven 2.1, Kombustor. And it doesn't sound like an amplified version of another identifiable noise the card makes in those applications. Any help? Is my card faulty? Or is it normal for a card to make a weird noise in GPU3?