I'm in a similar boat... currently have AMD A-10 3.5 Ghz quad core, but it struggles with a few of the 3D games. I was thinking about updating MAME and my romset, but not sure it would be worth the hassle and cost since I would probably need a faster CPU, main board, RAM, and power supply . Looks like I'll be sticking with my older version of MAME so I don't get any further performance hits!