Well, IMHO, in the old days, you might have gotten away with your setup (true early arcade games). For the longest time, I ran all MAME on older PC's due to the fact that they were not memory hogs or video hogs. With the games that you mention, however, i would suggest running them on a faster processor. Those games, in particular, eat up video. My main machine for GAMEEX is a 2.4 processor, with 128, but my test machine is a 3.0 with a 256 card, and there is quite a difference. With the media that I have loaded, I also have a gig+ memory, but it is your call as to what you need. I always follow the tried and true rule..more memory and faster processor speed is better!! Hope that helps!