If you're using anything from Nvidia that has a 4-digit code, and the second number is a "3" you're using a super low end tight-budget card.
If you can, stick to cards where (at least with nvidia) the second digit is a 6 or if you can afford it a 8 or 9.
7300
8300
low low end. Cheap. Spreadsheet cards.
7600
8600
Better, decent for gaming, lower end of "higher quality"
8800
9800
high end, generally considered to be great gaming cards. Problems come up though, as you need to have a system that supports these cards, and can power these cards.
Just a down-and-dirty tip.