My other computer has a GigaByte GA-5AX Socket7 motherboard (With an AMD K6-3 400MHz CPU in) and basically when I plug an AGP graphics card in, it doesn't detect it, and gives me the beep code associated with "no video card". I've tried various cards, old and new. It's got the latest BIOS. It's set to boot from AGP video, and it works with my PCI Voodoo Banshee.
Any ideas?