Windows Vista Forums

Underclocking an X1650 Pro in Vista 64?

  1. #1

    Join Date : Apr 2007
    Posts : 1
    Local Time: 01:02 PM

    Underclocking an X1650 Pro in Vista 64?

    I have a Radeon X1650 Pro, and it just doesn't work - the display driver crashes trying to play any game newer than the original Unreal Tournament. I'm using the latest Catalyst drivers (7.3) but no luck. I'm trying to see if it's actually a heat issue, which I could figure out by drastically underclocking the card. However, I have no idea how to underclock something in Vista x64. Since it requires signed drivers, I can't install ATITool or the like. Any ideas?

      My System SpecsSystem Spec


  3. #2
    chinga69's Avatar

    Senior Member

    Join Date : Feb 2007
    Posts : 247
    vista ultimate 64
    Local Time: 07:02 AM
    australia au new south wales 2

    if its only the drivers are unsigned then run this command then reboot.
    then install the drivers, will allow 64 to boot with unsigned drivers

    Bcdedit.exe /set TESTSIGNING ON

    Bcdedit.exe /set TESTSIGNING OFF

      My System SpecsSystem Spec

Underclocking an X1650 Pro in Vista 64?
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