How well does Amithlon run? Does all old Amiga software/games work?
It's incredibly fast which is great for 3D rendering and image processing. Most system friendly software works although there will be some exceptions.
For software that hits the hardware you'll need UAE. Back when I First tried it on 750Mhz Athlon I tried an OCS/ECS version of UAE 68k the games I tried ran perfectly. You can get 68k builds of E-UAE now AGA support.