I have the Gigabyte GTX 460 1GB OC (got for <£170 inc VAT+postage), and it's very quiet, just a tiny swoosh of air, and I can't hear the fan change between desktop and in-game. It's quiet all the time. It's still running at stock though (715MHz core).
Unlike my single-slot BFG 8800GT which had an ear-piercing whine which sounded like a 747 in-game. OCCT GPU would overheat it and it had to shutdown. The fan on the 8800GT would start at 100% on power-on, so it would be deafening for a few seconds. It's weird starting my PC now, it's almost silent when I press the power-on button (sometimes I think I've not actually pressed the button all the way in).
Unlike my single-slot BFG 8800GT which had an ear-piercing whine which sounded like a 747 in-game. OCCT GPU would overheat it and it had to shutdown. The fan on the 8800GT would start at 100% on power-on, so it would be deafening for a few seconds. It's weird starting my PC now, it's almost silent when I press the power-on button (sometimes I think I've not actually pressed the button all the way in).


(Along with the EVGA EE)