There are three common AGP interfaces: 3.3 V (AGP 1.0 - 1X and 2X), 1.5 V (AGP 2.0 - 4X), and 0.8 V (AGP 3.0 - 8X). Check your motherboard or computer manual before you purchase and install a new AGP card. Installing an AGP video card that is not supported by your motherboard will not work and may damage your PC.
Note: PCIe (PCI Express) has replaced AGP as the standard video card interface. AGP previously replaced the use of PCI interfaces for video.