I got it and installed it today. This is the darndest thing I have ever seen. I am running an Antec 900 case and True Ex 120. I have two fans on the True Ex, and all other fans on low, except the large fan on the top. With the stock cooler on my BFG 8800GT my idle temps were 59C with the fan on 40%, and while folding and the fan on 95% my temps hit 84C. Now with the A S1, and no turbo modual or any other fans blowing on it, I idle at 38C and load at 48C while folding with the gpu on stock settings.
I have always been able to run the core at 750 and shaders at 1879 with no volt mod. My memory however could not go past 945. I was able to run ATI tool set to 750/1879/1000 for 45 minutes before I got a BSD instead of the driver stopped responding error. Temps never broke 51C the whole time. My room temperature is about 75F.
The only downsides to this cooler and case combo I have is the front usb cable is not long enough to get plugged in around this cooler. I need to see if I can get a cable extention or make one myself. I also had to remove the 120mm fan from the side of the case, it would not fit with the A S1 installed. Be carefull if you put the clips on. I knocked off one of the memory chip coolers. I was able to use some tweezers to straighten it and press it back down. So far its holding.
The only other thing I can say it silence is golden. Even my wife was impressed how quiet the computer is now.
Edit:Correction, it was my firewire that could not be hooked up. Since I dont use firewire, I guess I dont have a problem with this.