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Thread: Open-Source Radeon Tries Again For PCI-E 2.0

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  1. #1
    Join Date
    Jan 2007
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    15,650

    Default Open-Source Radeon Tries Again For PCI-E 2.0

    Phoronix: Open-Source Radeon Tries Again For PCI-E 2.0

    David Airlie sent in some PCI Express 2.0 patches for the Linux kernel DRM this morning, which will hopefully allow supported Radeon graphics cards to run at PCI-E 2.0 speeds by default...

    http://www.phoronix.com/vr.php?view=MTEyNzM

  2. #2
    Join Date
    Nov 2008
    Location
    Madison, WI, USA
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    884

    Default

    Woo!

    Glad to see that the attempt is being made. My machines at home all work wonderfully with PCI-E 2.0, and it'll be nice to not have to set a kernel parameter to do it in the future.

    My machines:
    Phenom x3 720 on Gigabyte 780G (built-in HD3200)
    Phenom x6 1055t on Gigabyte 785G (Radeon 6850)
    Llano 3500-series w/ built-in GPU

  3. #3
    Join Date
    Nov 2010
    Location
    Stockholm, Sweden
    Posts
    429

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    I agree, it's nice to see it going in. Hopefully they can weed out the issues popping up when it reaches the broad audiences.

    I've been running with the kernel parameter since Phoronix wrote about how to do it and I've yet to run into any issues. Also running Gigabyte mainboard with a Radeon 4850.

  4. #4
    Join Date
    May 2011
    Posts
    353

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    I have a motherboard here that's not PCIe 2.0 capable (Asus M4N68T LE V2). Howev I don't have a Radeon card to test if it indeed detects that PCIe 2.0 can't be enabled.

  5. #5
    Join Date
    Nov 2010
    Posts
    435

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    There has to be a big reason why the open source driver is doing so poorly compared to AMD's. PCI-E 2.0 will give you 1-3 fps increase. I remember when ATI made the Radeon 8500, that John Carmack found a bug on their driver that made a huge difference in performance. Can't remember what the bug was.

  6. #6
    Join Date
    Dec 2011
    Posts
    2,195

    Default Guys

    Guys, I hate to say it, but PCI Express 3.0 is out...

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