4830 causes monitor to go into power save mode help!

I have a dell core 2 quad 6600, 4 gb ram, integrated video/audio ...g45 chipset on windows vista 64. i just bought an asus hd4830 and the computer booted fine...but after installed catalyist drivers it boots up and the screen goes to power save mode....I can boot up into safe mode and uninstall it and then boot it up again fine....i have tried downloading the newest and what the asus card came with...does the same with both....what can I do>
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  1. oh, and It goes into power save mode after the windows driver bar is done...when the next screen should be windows desktop...is when it goes into power save mode.
  2. Same problem here. Monitor goes into power saving mode just before the login screen appears.

    Fresh install of 32 bit Windows XP Pro with SP/3 and the latest drivers dated Feb. 20, 2009 did not resolve the issue.

    My card is the SAPPHIRE 100265HDMI Radeon HD 4830 512MB

    Driver package: 9-2_xp32_dd_ccc_wdm_enu_75974

    I was able to get the drivers to load successfully one time (after restarting from a safe mode session) and that appears to have been a fluke- the problem reappeared with the next reboot.

    Any help would be appreciated.

    My system
    GIGABYTE GA-MA790X-UD4 Motherboard
    AMD Phenom 8650 Toliman 2.3GHz Socket AM2+ Processor
    G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 memory
    Rosewill Stallion Series RD600N-2SB-SL-BK 600W Power Supply

    No over clocking has been performed on the system, all stock settings.
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