"I use this in Windows XP Media Center Edition 2005 without any problems"4.0 starson by midfingr
Pros: Really versitile card, nice remote, capture video and audio from any source
Cons: Heat can be a hassle sometimes
Summary: I built a custom Media Center box, thinking I had to buy a deditacted TV tuner. I was suprised that the 9800 worked - maybe support was added recently? I can watch, record, time shift TV, etc - all within XP Media Center 2005's shell.
One thing though. The Event Viewer message spam about ati2mtag - SRB command failed – SRB_OPEN_STREAM is a mystery to me. I've tried looking for answers and found very little about this.
But all in all, it performs great. Games run very well. I can't think of any game out right now that this card will not run.