http://www.gamesforwindows.com/en-US/Ab ... ctX10.aspx
QuoteYou can see the difference for yourself when we compare Picture 2, a screenshot taken from 'Halo: Combat evolved', a PC game which was among the best of its class at release to Picture 1, an image from 'Crysis', a PC game which is slated to release soon. Halo uses DirectX®9.0b to support its graphics while Crysis makes use of DirectX®10.