Turion processor should be ok, even if it single core, it wouldnt helped if it were dual core, this is depended of game engine, usually game's are implemented in single thread (at least main loop). I have Turion X2 (dual) and its fast machine, I can run old 3d games just fine (old because I have only integrated GPU X1150 from ATI). How fast it will run it's up to your graphics card. If is it integrated GPU (graphics), it will be very slow, if you have let say ATI X1600 or something like from NVIDIA (7600), it will probaly run ok.