The GeForce 6200 is an AWFULLY underpowered card.

Seriously It's BAD.

Any off the shelf HP is unlikely to have 2x 8 or 1 lane channels... so upgrading is going to be nearly impossible. I would figure somebody who can take his cpu apart and is can IT monkey would simply newegg.com and buy their own parts and put it together? Seems like you learned your lesson, any chance you can return the computer or is it eBay time?