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What is PCI Express X 1 for?

By cigarman ยท 8 replies
Feb 24, 2006
  1. I know that PCI express x 16 is ideal for top notch video cards, but what is PCI Express x 1 used for?
  2. vnf4ultra

    vnf4ultra TechSpot Paladin Posts: 1,388

  3. Mictlantecuhtli

    Mictlantecuhtli TS Evangelist Posts: 4,345   +11

    It's supposed to replace normal PCI cards. In addition to vnf4ultra's list, there are also TV cards using PCI-E.
  4. Nodsu

    Nodsu TS Rookie Posts: 5,837   +6

    And if your next question is "why not use PCI-E 16x", then the reason is pretty plain: it's cheaper. 1x requires 16 times less circuitry saving a lot of PCB and silicon real estate.
  5. Ruben

    Ruben TS Rookie Posts: 100

    Is PCIe x1 really faster then normal PCI 2.1?
    I mean would networking card or video for PCIe work better then the same card for PCI?
  6. Nodsu

    Nodsu TS Rookie Posts: 5,837   +6

    A single PCI-E lane is about 2x faster than PCI. PCI-E is also full duplex, meaning that if you send and receive at the same time, a 1x link can be up to 4 times as fast as plain PCI.
  7. Quack 4

    Quack 4 TS Rookie

    Another question

    So, besides graphics card, what other card would really benefit from the faster architecture? TV tuners and Firewire?
  8. Nodsu

    Nodsu TS Rookie Posts: 5,837   +6

    Anything can benefit from PCI-E.. Since PCI-E is not a bus, every device on it has a full-duplex dedicated link - no more waiting behind each other to transfer data.
  9. Coolmatt

    Coolmatt TS Rookie Posts: 66

    Are you talking about that small 2 CM PCI port? If so, then I ask the same question.
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