l_oliveira
Professional
CPU SPEED doesn't really matter when game programs are bound to video vertical sync interrupt. That's how the CPS1, CPS2 and Neo Geo work. What happens when the CPU "runs out of juice" on a frame is that it either drops frames (too much work load for the allotted time for a video update) or it skips processing. That's what happens for example with Metal Slug2 on the Neo Geo. If a game doesn't use too much processor time to get to the point it slows down, moving it to a faster board will have no noticeable effect at all. But the opposite is true ( solving MS2 slowdown by OC'ing the NG).