Hmm I've got Zotac 8800GTS not Amp! edition, reference one and installed Accelero S1 on it as load temps were really high (you know, playing CoD4 MP for 5+hours hehe), usually more than 88C. With Accelero on it, load temps don't go higher than 49C and ambient 39C.
So I tried to overclock it, some strange error while loading driver for AtiTool under vista 64 but artifact scanning was fine, running for 4 hours without any problem. To be honest I don't know how far I can go. I tried 804/1080 and no problem, temperature under load 51C. I will try this weekend something like 830/1100 to see. The only thing why I'm doing this is Crysis @1920x1200, on stock i was getting average 25fps (High Settings) and with OC 35fps (same settings), DX10 very high stock 18fps, OC 28fps - still not fps to my taste. I want to give it a try as I spent money on Crysis but find it quite boring and unplayable comparing to CoD4. Will post results once I overclock it.
Oh btw, my system:
C2D
[email protected], Zotac 8800GTS/512/Accelero S1 @804/1080, Hitachi SATA2 250GB, Gigabyte 965P-DS4, 4x1GB GEiL low latency, Antec P182, Scythe Ninja Rev. B + Nexus 120, intake and exhaust Nexus 120, top and lower chamber Xilence 120, Tagan U480 PSU, optical drives and other stuff and the best gaming screen ever Dell 2707WFP.