Dxdiag log or post the model of you graphics card please. 1GB ATI graphics card is pretty meaningless, and it might be an integrated card that shares up to 1GB of system ram for all we know.
Also, to the other posters on here putting down laptops for gaming... It's true that the best desktop graphics cards are not available in laptops in any given year. Usually the best laptop card is about as powerful as the prior generation's desktop card (and sometimes better aka nvidia laptop cards are DX11 but performance-wise similar to non-sli 280s). But for mainstream gaming, that's enough to run on 'high' settings for virtually all modern games. My laptop is an asus g73jw with an nvidia gtx 460m. Performance-wise, it's around the same (and sometimes better, sometimes worse) as a desktop gts 450. Yes you can build a cheap desktop around a gts 450 no problem and yes this laptop is nearly $1800. But you can't take a desktop with you.. well not easily. If that means nothing you to, definitely stick with a desktop.. more bang for the buck. More bang period considering you can get more powerful hardware not available in mobile versions. But I like taking my gaming laptop wherever I go, hooking it up to my tv upstairs if my wife is watching downstairs, etc. It's conveniant, it's a relatively small HTPC if I want it to be too... Even though it's comparable to a gts 450, they don't make that in low profile for a HTPC. That's my story