The best replacement for agp is pci.

The best alternatives to agp are rated as following:
★★★★★  pci
★★★★  pci express
★★★  pcie
★★★  pci video card
★★  pci slot
★  pci graphics card
★  agp 8x
★  agp pro
★  pci e
★  pcie x16
★  pci-e
★  pcie video card
★  pci video cards
★  pci better
★  pci graphics
★  pci express slot
★  gpu
★  pci video
  pcie slot
  pci graphics cards
  pci difference
  pci faster
  pcie connector
  8x agp
  pci slots
  pci video card performance
  pci graphic card
  sli
  pci-express
  agp 2.0
  pci express x16
  pci x16
  pci cards
  pci-x
  pci bus
  4x agp

Your alternative for agp is not listed? Suggest!
Speaking about agp, one probably shouldn't forget about bjp.

Other search terms related to agp and their ratings are:
★★★★★ bjp
★★★ pci express
★★★ motherboard
You have in mind a companion for agp and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of agp in all years. Click on graph for more.
agp
pci
pci express