VGA Distribution amps

[CT11]

first off if you are using an LCD you really should be using DVI. VGA will cause loss of quality. secondly a distribution amplifier will only allow you to display the same thing on both screens.

DVI is just the monitor interface. You probably got bad performance because you computer lacked resources. For anything 2d your video card does very little work and the interface (VGA, DVI, component, etc) does not matter at all.