Re: Shader clock speed for 8800 GTS
For best results, don't manually adjust the Shader Clock. What I mean is, assuming you are using the latest drivers and Rivatuner, make sure you have Rivatuner set to Auto Adjust the Shader Clock when you adjust the Core/Memory. Manually adjusting can work, but you have to know what increments the card works in as well. On my 8800GTS 640MB, I manually adjusted the Shader Clock once and it performed great...for about 10-20 minutes then the screen would wig out (playing Rainbow Six Vegas). Anyways, good luck.
AMD FX-8320 Vishera 8-Core 3.5GHz (4.0GHz Turbo)
G.SKILL Ripjaws X Series 16GB (4x4GB)
EVGA SuperClocked GeForce GTX 760 2GB w/ EVGA ACX Cooler
MSI GTX 460 (Dedicated PhysX)