When trying to do up your house, money is an issue !!! Since conception the M.A.M.E. monster has run on a AMD PR120 clocked to PR160 with a bus speed of 75 Mhz, this hacking gets a little more performance out of the thing and as of yet has caused no problems - want more info on clocking ? Go see Tom.  Recently I've had to upgrade the disk to 4.3 GB IDE (Those Neo Geo roms are killing me !!) and I guess at some point the processor will need an overhaul to keep up with everything, at the moment it runs most games OK, often needing a little framsskipping....