Really? Christ, how old is it?
It's not it's age that's the problem. Let me explain...My dev PC started life as a dedicated MAME box. As such, I bought a second hand Hantarex 21" monitor that has a TV grade tube (i.e. massive dot pitch). This gives MAME games an authentic arcade look. It can only do a max of 800x600 60Hz. This is great for playing old arcade games - not so great for everything else. :/