ZSNES is  ultra fast and should run at full speed on any Celeron or faster PC.  It supports some Super Nintendo features which are very hard to emulate (and which were unavailable just a while ago), like DSP1 emulation (Mario Kart), SuperFX emulation (StarFox) and now even C4 emulation (Megaman X3)! These features make ZSNES the most compatible Super Nintendo emulator available.

Download SNES Emulator for PC