Videocard trouble

Well seems that the X600 for the server is broke. I don't have time to test it furter, so I bought me a new one. They come quite cheap to my surprise. I went with a Nvidia 8400 GS http://www.inno3d.com/products/graphic_card/gf8/8400gs.htm

Plugged it in an tada! Finally something appeared on the screen. Now I just have to decide for a system for my server. I don't know if I should install W2K3 server or try some linux clone. I'll have to ask around...