RS2k... 256 minus 224 equals?
the graphics (card) is a biuilt in onboard jobby and shares the system memory...
tiff, that PC wont play anything new (ie made in the past year) without slowing right down...
bit more memory and a good graphic card will sort you out to play most stuff acceptably

go buy yourself a 256mb memory chip and a gfx card that costs about 50quid and you should be ok