What the difference between agp video cards and pci video cards. Are pci older than agp?

I know that pci-e video cards are the latest

What the difference between agp video cards and pci video cards. Are pci older than agp?
PCI are usuallly older than AGP. There are newer video cards that are PCI-E.





AGP video cards are usually "better" (faster) than PCI video cards. Some of them actually have a processor on them. (which really helps the computer to process the information and display it on your monitor more quickly. That is especially important if you are playing games.) PCI-E video cards are better (faster) than AGP video cards.





The major difference between the three of them is, of course, the type of connection that each of them uses. Older motherboards have only PCI slots. Newer motherboards have both PCI slots and a AGP slot. Even newer motherboards have a PCI-E slot.





If you want to buy a better video card - - the first thing to do is to find out what kind of slots your motherboard has ! !





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Reply:PCI is slower than AGP 8x





PCI-E is faster than both.
Reply:PCI Express cards are newer than AGP cards.





The motherboard slots for the two types of graphics cards are very different. Determine which is supported by your motherboard before you buy a new video card.
Reply:The Theory Of AGP-Performance Vs. PCI-Performance





AGP specifications allowed two different AGP-speeds, AGP1x and AGP2x. The main differences between AGP and PCI start with the fact that AGP is a 'port', which means it can only host one client and this client ought to be a graphics accelerator. PCI is a bus, and it can serve several different kinds of clients, may it be a graphics accelerator, a network card, a SCSI host adapter or a sound card. All those different clients have to share the PCI-bus and its bandwidth, while AGP offers one direct connection to the chipset and from there to the memory, the CPU or the PCI-bus.





The normal PCI-bus is 32-bit wide and is clocked at 33 MHz. Thus it can offer a maximum bandwidth of 33 * 4 Byte/s = 133 MB/s. The new PCI64/66-specification offers four times as much, it comes with 64-bit width and a 66 MHz clock, thus its bandwidth limitation lies at 533 MB/s. However, please let's not forget that PCI64/66 is hardly supported anywhere yet and it was particularly developed to host I/O-controllers with very high data bandwidth, as e.g. IEEE1394 or Gbit-network interface cards. AGP is clocked at 66 MHz to begin with and it is 32-bit wide. This offers a maximal bandwidth of 266 MB/s in case of AGP1x, where data is transferred the common way, at the 'falling edge' of each clock. AGP2x offers 533 MB/s, by transferring data at the rising as well as the falling edge of the clock. The new addition called AGP4x doubles this bandwidth another time to 1066 MB/s.