I have noticed a fast & continuous "tick-tick" sound during load on my 4870x2 and GTX 285. It is not loud, but audible because it is different from the PC fans noise. The sound disappears on idle mode. The sound is fast if the fps is fast, and become slower when the fps is low because of heavy details. I am using 4870x2 earlier. At first i thought it is from the fan, but later found out is not the case; because I am annoyed enough and use water cooling to remove the sound but the sound still exists. Then i thought could be because of stupid ATi design and changed to GTX285, the same thing still happens. Even when i use Vista dreamscene the sound could come out. It is not from PSU. Any other having the same issue?