your video is onboard graphics, & uses MUCH MUCH Slower system RAM, add in the fact that the Geforce 6100 chip isn't all that great for gaming, maybe for much older games, & usually better than much of Intels Onboard graphics, but its still pretty bad.
if you can install a Dedicated Video Card, that will improve things quite a bit... even something like a basic Geforce 6200, 7300, or 8400/8500 series card will be better than that onboard video.