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Testing at x16, x8, x4, x1

PCI Express 2.0 Graphics Cards: How Much Extra Performance Do They Really Give?
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pci express 2.0

You can limit PCI Express lane count by taping the connectors that aren’t required. Pay attention if you do so.

Once again we taped the pins we didn’t want when we wanted to narrow down the number of PCI Express 2.0 lanes used. No taping was required for x16 PCIe 2.0, while more and more of the 164 pins had to be taped to reduce the link width. If you do this, pay close attention to ensure that you cover the correct pins.

PCIe 2.0 x16

pci express 2.0

16 PCI Express 2.0 lanes equals the maximum link width of current PCI Express 2.0 graphics cards. The total bandwidth is 8 GB/s upstream and 8 GB/s downstream.

pci express 2.0

ATI’s Radeon HD 3850 running on 16 PCI Express 2.0 lanes.

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  • 0 Hide
    mi1ez , 24 April 2008 17:28
    The x1 mark is wrong in the diagram- it's the gap right after the key, not ON the key!
  • -1 Hide
    Anonymous , 28 April 2008 18:15
    My nVidia GeForce 8800 GTS 512 is marketed as being PCIe 2.0. Why is this not listed?
  • 1 Hide
    spanner_razor , 5 May 2008 03:53
    Typo on the last page referring to 9800GX2 as 9900.
  • -1 Hide
    jeanpieterse , 7 August 2008 23:23
    My nVidia GeForce 8800GS 384MB is marketed as being PCIe 2.0. Why is this not listed?
  • 0 Hide
    jodrummersh , 18 October 2008 00:51
    This article is terribly misleading and does not test what it promises. It's only purpose is to test PCIe 2.0 x16 against PCIe 2.0 x8, x4 and x1.

    Woulda been nice if they actually tested PCIe 2.0 (x16) against PCIe 1.1 since this would actually be of some relevance and importance to us. Anyone else think so?
  • -1 Hide
    erdinger , 20 January 2009 22:09
    This article is terribly misleading and does not test what it promises. It's only purpose is to test PCIe 2.0 x16 against PCIe 2.0 x8, x4 and x1.

    Woulda been nice if they actually tested PCIe 2.0 (x16) against PCIe 1.1 since this would actually be of some relevance and importance to us. Anyone else think so?

    I agree