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my HD2600 doesn't have a stable onboard clock oscillator :(

Discussion in 'AMD / ATI' started by leeperry, Feb 19, 2008.

  1. leeperry New Member

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    Hi there,

    I've got a Sapphire HD2600 that gives stunning results on a HC3100 DLP projector with HD movies.

    But I'm starting to realize that it doesn't have a stable onboard clock oscillator :(

    I can get rock stable 24.000fps in 1280*768 48Hz, but not in 24/72/96Hz....it's always oscilatting between 23.99x and 24.00x :banghead:

    same goes for 1920*1080 24/48Hz....not stable at all :(

    even worse, it's UNABLE to output 1280*720 48.000Hz, the best it can do is 48.545Hz :(

    [​IMG]

    [​IMG]

    OTOH everything's fine in 720p@72Hz :

    [​IMG]

    but my 1280*720 48.545Hz ends up in 24.273fps in MPC HC :

    [​IMG]

    [​IMG]

    is there any recent ATi card with more sensitive/stable oscillator around ? :(

    a friend of mine has copied my 1280*720@48Hz powerstrip settings in his 8600GT drivers, and he ends up with 48.004Hz in Reclock.....so I don't know whether Powerstrip is at fault, or if my videocard oscillator is not sensitive/stable enough :(

    TIA,
     
    Last edited: Feb 19, 2008
  2. leeperry New Member

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    in 1280*768 48.000Hz, the system clock in Reclock is on 2857460.00 Hz +0.00 Hz (+/- 0.00 ppm)....and the frame rate is rock stable in MPC HC on 24.000

    in 1024*768 96.000Hz, it's on +2.63 Hz (+/- 0.00 ppm)....yet the frame rate in MPC HC is oscillating like crazy between 23.99x and 24.00x

    I would appreciate rock stable frame rate in any given situation........or at least in 1280*768 72/75Hz so I get less RBE on my DLP projector....but right now it's also fluctuating like crazy between 23.99x and 24.00x....only 1280*768 48Hz is rock solid :
    [​IMG]

    and this is 1280*768 72Hz, which is not rock solid and drops frames....with the risk of stuttering like crazy after 40/50 mins :
    [​IMG]
     

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