Direct 3D Vsync and nForce

I am using a MSI K7N420 Pro mobo and using the integrated GeForce2 MX. I want to turn off Vsync for Direct 3D apps. But I can't see any option to turn this option off. There are two options under Direct 3D tab, nothing about turning on or off Vsync. Well, I can turn off Vsync. for OpenGL apps. Do you know what's the problem? Is there any other way to turn of Vsync. for D3D in Integrated GeForce2 MX of nForce?

I am using following drivers :

nForce System Drivers v1.05 in both WinMe and WinXP
DetonatorXP 40.41 in WinXP and DetonatorXP 30.82 in WinMe

hello, without that board I can't help, however, the only point in turning v-sync off is for benchmarking. Turning off v-sync will also cause tearing across the screen. Everybody should run with v-sync on.