When I play Quake Live or any other games I can't really feel the 120 hz. Especially not when I'm moving my mouse fast. The image becomes blurry or sort of "after effects". I'm using the BenQ monitor.

The settings in the OSD panel is:
AMA: off
Instant mode: on

My gfx card is GeForce GTX 260 with latest drivers and yes, I'm using a DVI cable.

r_displayrefresh is set to 120 ofc.

I hope you can help me. This is driving me insane. Especially when the support can't even help you.

My Nvidia settings: