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ASRock 870 Extreme 3 PCIe slot problem.

My PCIe slots aren't running at their normal bandwidths of 16x/4x. Instead they are running at x4/x8(according to GPU-Z). The board is advertised to run at 8x/8x, which I now know was a lie according to all 870 board specs, but is supposed to run at 16x/4x. I never checked their bandwidths untill now so they could have been these speeds the whole time. My question is, is this normal? Is there something to fix it and put it back to its proper speeds? Can provide GPU-Z pics if needed.


My PC:

Motherboard: ASRock 870 Extreme 3
CPU: AMD Phenom II x6 1090T
Memory Wintec 2x2GB @ 1333 MHz
PSU: Corsair TX750w
GPU(s): Sapphire 6870&6850 CFX
9 answers Last reply Best Answer
More about asrock extreme pcie slot problem
  1. Please post a side-by-side GPU-Z pic showing each card's info.
  2. Welcome to Tom's Forum! :)

    Q - Are any of the other PCIe slots occupied? e.g. Sound Card etc.

    Yeah, I did notice the HD 6850 + HD 6870; I know they 'can' work together see chart -> http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg

    Q - Did you use the Flash unlock update on your HD 6950?

    Q - Is the HD 6970 installed in the top PCIe slot?
  3. Here are the screens requested. First one is the first slot(6870), second is the second slot (6850).





    Jaquith, these are 68xx series cards, not 69xx series. No other slots are occupied.
  4. Have you swapped the cards around in those slots? Does the x4 and x8 stick with the cards or the slots? Just asking to determine what the behavior of the motherboard and graphics card interaction is.
  5. Switched the cards around and now GPU-Z is showing 8x/8x, I'll switch them back to see if it reverts back to 4x/8x.
  6. Switched the cards back, I guess no drivers were installed on my second card, I don't know if that was the source of the problems. GPU-Z is still reporting 8x/8x.


  7. Best answer
    It seems to have fixed itself. x8/x8 is exactly what I was expecting to see. Quite the odd behavior I must say just to get it to show properly.
  8. Yep, I was going to suggest the flipping as well. Glad to here it fixed itself x2!

    RE 6950 -- I was getting a excited ; the flashing works! ;)
  9. Best answer selected by Forsakenfire.
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