I'm not really sure what all the technical details mean, but when I first tried playing Deus Ex about a week ago, I couldn't raise the resolution past a certain point and all the dialogue kept cutting off before the actor was finished speaking. It was very annoying. I understand some of you want to keep the experience as "pure as possible", but dialogue cutting out is really not what was supposed to happen when the game was released. Just get the fix in the link below.
 
http://kentie.net/article/dxguide/ 
 
For anyone who wants to go the whole nine yards to mod the game up so it looks better and plays better, follow the guide here: http://www.reddit.com/r/gaming/comments/ceuyh/step_by_step_moddingguide_deus_ex_i_spilled_my/ 
Except get the new version of the "New Vision" pack, because that guide above still uses the old version.

thanks, I still need to play ... the box has been staring at me for a year or so^^

I don't have that problem, and mods like New Vision works fine on my Steam version but thanks for sharing.

Does the Steam version have these issues as well?

I have Windows 7 64-bit and haven't had any issues playing the Steam version.

Window 7, 64 bit, has steam upgraded theirs? I have been playing at high res. and the game..for what it is, looks great. Honestly I was suprised.

I also experienced the dialogue audio cutting out when I installed Deus Ex - forcing vsyc through my video card's driver fixed it up! 
 
Running Win 7 x64.

I had the same audio issue on Windows 7 64 bit. This fix worked great. Thanks.