Viperlair look at PCI express and tell you the advantages and disadvantages over AGP.

For those who are looking for an upgrade to their system, PCIe (short for PCI Express) is a great technology to take advantage of. However, if you are looking to have the best possible graphics, there is no reason to splurge on a motherboard just with PCIe as AGP 4x and 8x should provide ample bandwidth for any intensive games you run, including Doom III / Half Life 2 and other soon-to-be released titles.

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