actually, system requirements is pretty bogus.
I pretty much pass all the games so far, the only game i couldnt is Crysis because it says i need 640MB of VRAM.
And yet, i cant really run all the games that smooth, like Far Cry 2.
I wouldnt trust it, though it kind of gives you a guideline on how you would do. I think my friends passed required specs, and yet he had to play on medium settings, and still lags a little sometimes.
Theres more to do than what the game shows what the required specs are, like whats your monitor res, the clocks of your processor, etc. Heck, you will even pass a lot of tests with a Pentium D. Some games considered the Pentium D as the same line as the Core 2s. But the differences are dramatic.