Games require a good video card to play, and are not so dependant on CPU's.
So if you did get a new card, than you would be able to play it at better quality, with the playable frame rates.
How much are you willing to spend (you may also need a new PSU if that one is generic.
The page file is automaticle set at, 2.5 times the amount you have, which is unnecesary. 1gb would be more than enough, if you want to change it.
Cisco CCNA, Comptia A+, 1/3 through CCNP