No problems I can ever think of hearing. I do have to say though that (depending on what processor you have) you could have gone with ATI and gotten a DX10 card.

A much faster one to boot. Nvidia pretty much left AGP behind after the 7 series, but ATI has continued on supporting it and has released several new gen cards on the AGP bus.
ATI 3850<---- Nice way to ramp up a AGP system if you have a fast processor.
Thanks for the answer.....
This pc is just my home pc..I will start building my super rig shortly.
Then I will buy the ducks guts everything....
As for ATI, I have a card which I put back in for a day while I took my Nvidia back, and I then remembered why I replaced the ATI...cause they are shite !!!!!!!!