What is the difference between PCI video cards and AGI video cards?

Firstly, i think you mean "AGP" not "AGI".





AGP or Accelerated Graphics Port succeeded PCI or Peripheral Component Interconnect as a technology to connect graphics cards to a computer's motherboard. PCI is still used to connect other devices like ethernet and sound cards.





AGP slots provide a dedicated link between the card and the CPU and thus providing faster communication between them. There are other enhancements as well. But the bottom line is that AGP cards perform much better.





But now AGP is getting phased in favor of PCIe or PCI Express which is even faster and can be used as the bus for all the devices in a machine.

What is the difference between PCI video cards and AGI video cards?
Hi. They use different interface slots on the motherboard. PCI Express is the newest and fastest, I've read.
Reply:I think you mean AGP.





It has to do with the "slots" for installing the video card. A computer may or may not have an AGP slot; they all have PCI slots. PCI Express is better (and faster yet); these require a PCI Express video card.
Reply:Speed, the early unoptimized AGP cards not withstanding, AGP is always faster than PCI, a separate bus standard call PCIe is totally different and faster than AGP.





And in the eyes of a computer engineer, AGP and PCI have different places in a computer hardware to cause this speed difference.