too many video drivers

[Tsu-Fan Cheng]

Hi,
   I am rebuilding ports and realize that i have too many input/video
drivers for x-win installed. i know i need nv driver since my graphic
card is from nvidia, and i want to deinstall all others. but i am not
sure if its safe to do so, e.g. i am confused by "xf86-video-chips"
since i don't know what kind of "chip" that stands for. can someone
tell me which are basics and which are safe to remove? thanks!!

TFC