PCIe x16 (at x4 speed) ?!

Discussion in 'Hardware Q&A' started by Vivek.28, Nov 23, 2009.

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  1. Vivek.28

    Vivek.28 Stuck

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    I have a Mercury PI945GZD motherboard. It has a PCIe x16 slot. But when I see the manual it says: PCIe x16 (at x4 speed)

    What does this 'at x4 speed' mean ?

    I was planning on buying a PCIe x16 based graphics card, but now I'm confused !
     
  2. asingh

    asingh New Member

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    ^^

    The PCI.Ex16 standard has 16 full duplex lanes (serial) which channel via the Northbridge to the GPU card.

    Your motherboard is setup in such a way, that only "4" of this lanes are available for data exchange. So theoretically this slot will run at 25% levels only. You can buy a GPU but it will be substantially held back due to this limited architecture.
     
  3. OP
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    Vivek.28

    Vivek.28 Stuck

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    Ohh !! Thanks for the reply...
     
  4. adirawat20

    adirawat20 New Member

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    Just buy a new mother board
     
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