Intel Celeron 600 "Coppermine128"

UnrealTournament is much like Quake III although limitations in the Unreal Engine cause the performance difference here to be around 9%.

The performance difference at the higher resolution is slightly higher than at 640 x 480 x 16 most likely because of limitations of the Unreal Engine but needless to say, a 13% performance improvement over the 66MHz memory bus is definitely noticeable.