Plus I was able to overclock each card by about 25%.
Did you replace the stock coolers to accomplish this? I think I'd be interested in replacing the stock fans for noise, if nothing else, but I've never done it on a video card.
Nope, just the standard cooler. They are actually quite good on this series. To get the 25% overclock (900 MHz), I had to bring the voltage up a bit to 1.15V. At this speed and voltage, I have the fan set to run at about 35% until the crad hits 60C, then it ramps up to about 55%. At 35% it is pretty quiet. At 55%, it is not so quiet, but the card is under load at this point so the sound of gaming drowns out the fan
At idle, the card is 52C with the overclock.
