If you are a gamer, you should not be thinking that integrated graphics can do the job.
How much system ram do you have? How fast and what kind is your processor?
Integrated graphics si not a graphics card at all. It is a chipset that steals regular system ram away from your computer (i hope you have enough to cope with this loss) and it steals processor power to do 100% of the graphics processing. A regular graphics card has its own processor and its own ram so it does not chore your processor or system ram as much.
Your integrated graphics can handle "up to 64 mb ram" if you have enough system ram to give up to it. If you have only 256 or 512 mb ram your probably running short on ram. If your going to be wanting to play games, you wont be able to change the size of the ram allocated towards graphics like you are saying, so you should buy some more ram and a new mid range graphics card if you want smooth game play.