I have a Asus P4SP-MX motherboard. I am not sure if my AGP 4x will provide enough (V) to run the video card?

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3570059&CatId=2234

Thats the card. its a HIS Radeon HD 2600 XT IceQ Turbo video card

I would like to know if it would function properly on my motherboard |||That card will definitely run on your motherboard. However, the card is a pretty fast 8X AGP card. It may be a bit bottlenecked by the 4X AGP slot. You may not realize the full potential of the card, possibly only about 80% of maximum performance.