ok, I just got a new pc about a week to two weeks ago, I have a Radeon 9600SE in it now, my motherboard has AGP 8x. Well, I tried to set my video card to 8x but it keeps resetting back to 4x after my PC boots back up. So I thought it was something in my BIOS I had to change, but my BIOS tells me it's set to 8X, and the video card will not set to 8X.
Hard to say. Update your drivers, blah, blah, blah.
On a somewhat postive note, with that card, you will not have any significant performance increase by having 8x vs 4x, but it should work assuming you have an 8x mobo.