7950 Stuck at PCI-E 1.1

Discussion in 'Videocards - AMD Radeon' started by Davehillbo, Feb 1, 2013.

  1. Davehillbo

    Davehillbo Member

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    Hi all, Just got an XFX Radeon HD 7950, and it appears to be stuck at PCI-E 1.1 16x, have tried diff PCI-E slots and this made no difference, my old 4870x2 was reporting PCI-E 2.0 working fine.
    Any ideas?

    David.
     
  2. Deathchild

    Deathchild Ancient Guru

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    Where does it say it's stuck at 1.1? GPU-z?
     
  3. Davehillbo

    Davehillbo Member

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    Yep, have stressed it in the background, makes no difference, doesn't change at all from 16x 1.1
     
  4. Extraordinary

    Extraordinary Ancient Guru

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    Click the ? on GPU-Z next the where it says 1.1
     

  5. Davehillbo

    Davehillbo Member

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    Yep, stressed the card, made no difference to PCI-E bus rate.
     
  6. Extraordinary

    Extraordinary Ancient Guru

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    Have you tried going to Device Manager > Right click the GPU > Update Driver > Browse computer for driver > Manually choose the same driver from the list as you already have installed and tell it to install that one again ?

    I've fixed that problem, and other clock issues by just doing that

    Its as if the driver was not actually installed fully for some reason

    Other things would be to reset the BIOS and set it back up again manually, I've had PCI-E lane speed problems fixed that way too
     
    Last edited: Feb 1, 2013
  7. PNeV

    PNeV Ancient Guru

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    Tried updating or reinstalling Chipset drivers?
     
  8. thatguy91

    thatguy91 Ancient Guru

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    PCI-E Link power management is probably set for high power saving instead of moderate. Moderate will automatically adjust to PCI-E 2.0 (or 3.0 for that card on supported platforms) when there is a graphical load, I believe on maximum it stays at the lower speed..
     
  9. Davehillbo

    Davehillbo Member

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    Already tried, made no difference :|
     
  10. Extraordinary

    Extraordinary Ancient Guru

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    Last you can do is stick that GPU in another machine and see what happens there, and vice versa, stick a known working card in your machine

    you`ll get your answer that way I expect
     

  11. thatguy91

    thatguy91 Ancient Guru

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    This could also be an issue with the existing OS installation, a driver issue (not being updated), or even a bios issue. Have you updated the computer bios to the latest version?
     
  12. Davehillbo

    Davehillbo Member

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    Bios is at the latest version (though it was 2009 lol). Going to reinstall.
     
  13. Davehillbo

    Davehillbo Member

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    OS reinstall, and problem still there :(
     
  14. Deathchild

    Deathchild Ancient Guru

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    Try it in your mates PC then.
     
  15. SolidBladez

    SolidBladez Ancient Guru

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    It's reporting the right speed. You're limited to PCIe 1.1 with Skulltrail. Yeah I know you said it reported PCIe 2.0 with your 4870x2 but it was probably a glitch.

    [​IMG]
     

  16. Davehillbo

    Davehillbo Member

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