http://www.crysis-online.com/forum/index.php/topic,11837.0.html http://www.crysis-online.com/?id=449 from what I've just read, apparently you can unlock the very high options in crysis without running dx10 and vista. can anyone confirm if this is true? as I don't have the game. any one heard about this crysis is often touted as the reason to use dx10 but if all the effects can be achieved in xp especially with a smaller performance hit... we've got a problem. oh and can someone point me to a technical paper or article on exactly why dx10 isn't runnable on xp. I know ground up it was coded for vista but besides the obvious money/marketing reasons, it seems bad to release an API that's on a very small percent of PC's with no backwards compatability. Is there some technical reason based on the way either OS addresses memory or some similar function? or is it all marketing driven?