I've been trying to see how far I can push a watercooled 8800GTS voltmodded with about 1.4 vgpu. The card never goes above 42 celsius. I'm not getting artifacts in ATITool, but it locks my entire PC up and I have to reset it. Upping the voltage doesn't seem to help. I'm guessing this means it just can't handle the core and/or shader clocks?