I own this board and had a problem with both the GF4 and the Gigabyte Radeon. The GF4 I could just never get to work, though I think it might have been bad. I used 3: 2 were PNY Ti 4400's and 1 was a gainward Ti 4400.
The gigabyte Radeon 8500 was a great card, but it does not fit on the Gigabyte board correctly. The connector on the DVI is set to low and hits the case before it is properly seated. My 8500 still worked, but still, I had to get rid of the card. The Reatail Radeon by ATI wokrs fine. Although, I will be selling mine when my Gainward Ti 4400 replacement gets here this week!
Over all though, the 7vrxp rocks. I love Gigabyte. I am running an 8IRXP now. It also rocks!