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HD 4850 D1601 Led -BlAcK ScrEEn-

Phenom II x4 955 Black Edition
Zalman CNPS 9700
Raidmax 630w PSU
Asus M4A79T deluxe
2x Sapphire HD4850 in Crossfire

I just recently put together my computer and tried to install ubuntu after i already had xp installed. after 2 failed ubuntu installations, i rebooted my computer and changed my cpu clock speed to 3600 MHz w/o changing any other voltage. i saved the changes and rebooted and the monitor couldnt display anything (aka black screen) and then i noticed one D1601 led on each graphics card light up. Can anyone help?
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More about 4850 d1601 black screen
  1. Something like this happened to me . I just removed the CMOS Battery and then replaced it back. Remove for like 5-10 seconds until the BIOS automatically resets. Its because of the overclock. Or use the CMOS jumpers to reset it.

    If not try the monitor on the onboard video port.
  2. Best answer
    Reset the BIOS and try for a less agressive overclock.
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