I've got a Visiontek Geforce 2 GTS-V (defaults at 175/286), and using coolbits I overclocked it to 215/360, almost the max the sliders would go, but there's barely no preformance increase or stability decrease. What the heck is going on? This is on a Windows XP machine w/ a Duron 1 Ghz and a Shuttle AK11.