bystander :
That depends on what is causing the lag. What game is it?
Lag doesn't necessarily mean it is the mouse. It could just be simply lag. Maybe you can describe what is happening further, and what game, system and settings are used.
Well ive tested few games.. like Far Cry 3,Outlast,and i experience mouse lag when enabling vsync. Using 1600x900 resolution and high settings. When i lower the graphics i still experience the same mouse lag..ive tried lower the resolution to its minumum 800x600 but still experience mouse lag,altrough its not the same as when its 1600x900