fps could mean first person shooter (game type, like Halo, Unreal Tournament 2004, quake 4, or counterstrike are all first person shooters) or frames per second (how well the system is performing in the game with the selected settings, the higher the frames per second the better).
games fsb... duno if ive ever heard of fsb being related to a game, but front side bus has to do with the cpu + motherboard.