Nvidia or ati with cinema display

Hi,

I just wondering if ATI HD 5770 or Nvidia GTS 450 for pc works with apple 27 inch led cinema display?

at the moment I have HD 4800, it doesn't work with windows 2008 server R2, do you know if HD 5770 or GTS 450 works with windows server 2008 R2?
I have download the latest ati catalyst for HD 4800 it doesn't work with 2008 server R2. very strange work find with win 7 64 bit but doesn't work with 2008 R2 64 bit?

Thank you.

Regards
- Haris -