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New sapphire radeon hd 7950 causes black screen when loading windows?

Hi, I recently purchased a Sapphire radeon hd 7950 http:// and after installing it, and setting it as primary gpu in BIOS, the screen blacks out as windows starts up. I'll call the manufacturer on monday but was hoping there is a solution to resolve the problem before then. I've never posted a question here before so I apologize if I'm leaving something out, or not being clear about anything. Any help would be appreciated, thanks!

CPU: i5 3570k
MB: Asus p8z77 v-lk
RAM: 8gig
PSU:600w corsaire
OS: Windows 8 pro 64bit
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  1. self135 said:
    Hi, I recently purchased a Sapphire radeon hd 7950 http:// and after installing it, and setting it as primary gpu in BIOS, the screen blacks out as windows starts up. I'll call the manufacturer on monday but was hoping there is a solution to resolve the problem before then. I've never posted a question here before so I apologize if I'm leaving something out, or not being clear about anything. Any help would be appreciated, thanks!

    CPU: i5 3570k
    MB: Asus p8z77 v-lk
    RAM: 8gig
    PSU:600w corsaire
    OS: Windows 8 pro 64bit


    But you do get into windows? How long does it go "Black" for? Dou have both the gpu and on chip enabled, or both to the monitor??
  2. Quote:
    But you do get into windows? How long does it go "Black" for? Dou have both the gpu and on chip enabled, or both to the monitor??


    No, the screen blacks after it shows the windows logo, then doesn't change and requires pulling the plug to restart. In bios I selected the pci-e as primary and have hdmi from gpu to monitor (not sure if that's quite what you're asking there)
  3. Best answer
    The primary output is usually the vga port, you may need to set the option in bios for the hdmi. even though you do get to POST screen, Windows might not recognise the hdmi as a video out option if it has not been set in the bios as primary (if that option is available).

    Never just pull a plug, use the rocker switch to turn off the power, wait about 15 seconds so that residual power is dispersed then pull the plug out but, then, you wouldn't need to pull out the plug, the rocker on/off (0/|) has turned off the PC. Pulling the plug out would stop any power from reaching the Pc so the bios battery would then invoke itself to provide power for the cmos chip.
  4. TenPc said:
    The primary output is usually the vga port, you may need to set the option in bios for the hdmi. even though you do get to POST screen, Windows might not recognise the hdmi as a video out option if it has not been set in the bios as primary (if that option is available).

    Never just pull a plug, use the rocker switch to turn off the power, wait about 15 seconds so that residual power is dispersed then pull the plug out but, then, you wouldn't need to pull out the plug, the rocker on/off (0/|) has turned off the PC. Pulling the plug out would stop any power from reaching the Pc so the bios battery would then invoke itself to provide power for the cmos chip.


    Thanks, I don't remember HDMI vs VGA being an option but I'll check that tonight. It's my first pc build and i'm obviously a bit clueless about some things, i.e. not unplugging pc. Thanks for your suggestions.
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