My Commodore Amiga 500 has better graphics than my486dx2 with 80 mhz and 12mb ram.
The Amiga I got when I was 5, that was twelve years ago, the amiga had 0.8 mb ram, I don\'t know about the megahertz but I can say that it wasn\'t high.
The amiga manages 16000 colours, thats optimising.
The last amiga that was made had a mhz of 120, don\'t know about the memory, but I think that it can compete with the best.