[QUOTE=jflan;2084782]You of course will need a card with an AGP interface.
Then you will need a power supply of 400W or better according to ATI.
ATI has a certified PS list at their site.
If you are going to purchase a PS, I recommend posting your prospects in the Hardware section of the forums and let the members here comment on your choice(s) prior to purchase.[/QUOTE]
I concur you will need a upgrade in PS if you going to use higher end AGP card. But make sure it is 4x or 8x AGP as well for the slot. You can use 8x in 4x but best if 4x to 4x and 8x to 8x. The reason for upgrade PS is higher end card requires a PS connection beside the AGP connection. So be sure to check that part out as well before buying.