Recently I've been overclocking my rig so I can get smoother framerates in Team Fortress 2. XP 2100+ (1.7ghz) nForce 2 mobo ATI X800 XL The FSB usually runs at 133mhz. The highest I can set the FSB without crashing is 161mhz which bumps the speed up to 2.093ghz (13 x 161 = 2093). Windows boots up fine, and Everest registers the overclock and the new speed. However, when I try to start up TF2, I get a "Cannot Create d3d Device" error message. I get the same message whenever I try to load any game. I've been testing and the highest FSB I can set and not get the above error message is 146mhz, which gives me a speed of 1.9mhz. Does anyone know why I'm getting the error message at FSB speeds of 147mhz and above, or how I can get rid of the error message.