What is AGP Slots?

An AGP slot is a dedicated port for graphics cards It was created because it could be faster than the original PCI for GPUs,

Either it's a PCI or PCIe The only reason that motherboard could have an AGP slot, is if the motherboard is custom built with that function in

agp slot function Accelerated Graphics Port slots are used mainly for video card use, for a high-speed, accelerated 3D graphics video as AGP gives a direct connection

agp slot AGP - Video card AMR - Modem, sound card CNR