Thank you all for the feedback; you've given me much to consider. I just want the high-pitched whirring sound to stop, not the fan noise per say. I too believe it's either the PSU or the GPU fan, but it is very hard to tell what's making the noise. I ruled out the CPU fan by unplugging it for a few ...

Howdy folks. Longtime lurker, but new to posting :) I am currently running the following: AMD Athlon II x3 w/ coolmaster CPU cooler. Antec 900 case with 4 120mm Antec 500W Earthwatts PSU AMD Athlon II X3 440 Rana COOLER MASTER Hyper TX3 92mm CPU Cooler Asus M4A77TD AM3 AMD 770 ATX AMD Motherboard AS...