Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: The Current State Of Radeon Power Management

  1. #1
    Join Date
    Jan 2007
    Posts
    15,123

    Default The Current State Of Radeon Power Management

    Phoronix: The Current State Of Radeon Power Management

    It's been a while since last looking at the state of power management for Radeon GPUs, but here's an updated look at the various options surrounding power management for modern ATI/AMD graphics processors and their effectiveness. Various drivers, graphics cards, and tuning options are compared.

    http://www.phoronix.com/vr.php?view=16793

  2. #2
    Join Date
    Aug 2010
    Posts
    48

    Default Power usage

    The idea of power management is to reduce the power used and increase battery life. So a benchmark without actually measuring the used power is quite worthless IMHO. What possible conclusion can be draw from this benchmark? That catalyst is still better in power management then the open source drivers? No surprises there.

  3. #3
    Join Date
    Jun 2011
    Posts
    118

    Default Haven't we already covered this?

    It wasn't that long ago that several articles were posted that essentially covered all the information in this article, and no announcements have been made to indicate that anything has changed with regards to power management. What's the point in this article? It's essentially just rehashing the same old story.

  4. #4

    Default

    And the one interesting thing to compare, how dynpm stacks up against the 'auto' profile, is sorely missing from the test. On my system, dynpm is still far worse, getting 5C higher just idling on the KDE desktop.

  5. #5
    Join Date
    Jun 2011
    Posts
    8

    Default

    Recently one of the developers said that people doesnt care much about power management, so its not in high priorities. Can we do something about it? May be some poll? There to many work(opengl, glsl, video acc, new chipset) to see usable pm even in year.

  6. #6
    Join Date
    Feb 2008
    Location
    Linuxland
    Posts
    5,186

    Default

    Missing results on the last graph of page 3, Cayman GPU voltage.

    Where's low from the graph? It's mentioned in the text though.

  7. #7
    Join Date
    Oct 2007
    Posts
    1,283

    Default

    Michael, the PTS specs on page 2 are terrible to look at. Is this one of those things that's better with a premium subscription? Despite the tablet trend, some of us still have relatively large desktop monitors..

  8. #8

    Default

    Quote Originally Posted by sstp View Post
    Recently one of the developers said that people doesnt care much about power management, so its not in high priorities. Can we do something about it? May be some poll?
    http://www.phoronix.com/scan.php?pag..._results&num=1 for example? Where power management isn't far behind the other two useful options (2d is mostly fast enough anyway these days, and Gallium and KMS are just means to an end, not that interesting in themselves for end-users).

  9. #9
    Join Date
    Mar 2008
    Location
    Istanbul
    Posts
    135

    Default

    I have HD6850, using open source stack, but it consume ~60-80W on idle!. Not acceptable for 7/24 open case...
    I can set "low" my GPU manually, than have problems when I require more power for short bursts (like compiz animations...)
    Also on "low GPU" state, card consumes ~10 more Watt than "catalyst"...

    Does it require much work to implement proper auto or dynPM settings? I think it's shame for AMD. Is there any DRM issue on power management of GPUs?
    I simply can't use my card due this. I just detached my radeon 6850 from MB and using integrated 790GX.

  10. #10
    Join Date
    Apr 2011
    Posts
    405

    Default

    He forgot to mention that dynpm is more or less unusable on a lot of Radeons because it causes display flickering as it cycles through the available clock speeds and it only works when you only have one display. If you have two or more displays it falls back to profile:auto which tends to work fine other than using more power.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •