GTX 680MX running at reduced PCIe link rate

Discussion in 'iMac' started by TigerClaw27, Jan 23, 2013.

  1. TigerClaw27 macrumors newbie

    Joined:
    Dec 14, 2012
    #1
    Has anyone else noticed that their 680MX is running at x16 2.5 Gb/s instead of the maximum 8.0 Gb/s?

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    This is under bootcamp Windows 7 x64. I wonder if there is a way to check the link speed in ML?
     
  2. bmcgrath macrumors 65816

    bmcgrath

    Joined:
    Oct 5, 2006
    Location:
    London, United Kingdom
  3. TigerClaw27 thread starter macrumors newbie

    Joined:
    Dec 14, 2012
    #3
    You're right. I loaded the GPU by copying an array out of it in a loop into main memory and the link rate shot up to 8 Gb/s.

    Thanks.
     

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