My HDD is louder then my video card once my systems boots into windows. I have a BFG 7800 GS OC , Thermaltake RX Series CL-P0295 92mm CPU Cooling Fan and six COOLER MASTER SAF-S83-E1 80 x 80 x 25mm Sleeve Silent 80mm Case Fans running.
My case barely cracks the 25db level and according to the Asus probe it doesnt go above 51* C even after four hours of WoW or BF2. I have rubber grommits with the fans so that might help. My case is some Antec POS full tower from compusa so even with that handicap it is still very quite.
Anyway, the BFG GS is not loud at all.