Just got my Gigabyte X800XL with Silentpipe cooling ( passive ) and when I play games without sound I can hear strange noises, I'm not sure if its the graphics card but I could'nt hear these when I had my X800PRO with fan cooling. The noise appears in ATI Tool while you are artifact scanning. Anyone know what could cause this noise, is it bad ? EDIT: forgot to mention that I've connected my graphics card, HDD and 2 DVD drives with the same power cable from the power supply unit, anything to do with it ? I've been listening more and more, and now im almost 100% sure the noise comes from the PSU, is this bad ?