Bluto...again with an incorrect answer...dumdass.
No, not all AGP slots accept all AGP video cards. In the early days there was a 1x AGP slot. Most newer video cards will not work in 1x mode, i.e. 9800Pro is one.
Also there are a very few cards that actually use an AGP 2.0 port that had a slightly different footprint. Remember back when there was a tab you had to flip over to use with AGP 2.0 cards only?
So the answer is...no. Not all AGP cards will work in any AGP port.
Soyo Dragon Ultra Platinum Edition powered by a P4 3.06GHz w/HT @ 533FSB
ATI Radeon X800Pro 256DDR <---Yeah!!! I finally got it!!!
1024MB PC3200, Creative Audigy LS, 2 x 40GB = 80GB RAID 0
Windows XP Pro, DOOM 3, CS, UT2004, BF1942 RtoR, CNC Generals
Finished Half-Life 2!!!!!!!!!!