I am wondering if anyone can help me out with this strange and puzzling problem that I am experiencing. I am using a a single Gigabyte GV-N460OC-1GI (GeForce 460) card http://gigabyte.com/products/product-page.aspx?pid=3530&dl=1#ov into which I have a couple of Samsung P2450H monitors connected via the DVI cables: http://www.samsung.com/us/computer/monitors/LS24LRZKUV/ZA My motherboard is a ASUS P6X58D Premium, my case is a HAF-X, I am not overclocking my i7-950 and my CPU cooler is a Cooler Master Hyper 212+. So here is what I am expereincing. 90% of the time when I have BOTH of the monitors turned on, I hear a very faint high-frequency noise emulating. If I have only one of the monitors turned on (doesn't matter which one), there is no noise. This "extra" noise is coming from somwhere within the case, so it could be the motherboard or the graphics card or ???. I very much doubt that it is any of the fans, as those are nearly silent and I would easily notice this by seeing "faster" RPM speed when I run Everest Sensor program. Also, I have double checked that Windows 7 display is setup for 60Hz for both of the monitors. My system is only 3 weeks old, and I doubt it's a capacitor issue (?!?) This noise is barely audible, but I definately hear it (I am a professional musician...). The noise is very different that the one people used to get when we all had CRT monitors and were trying to run in the "wrong" resultion. That was a very clear high frequency pitch that almost everyone could hear. Does anyone have any ideas what could be happening?