Discrete GFX Card - No Signal


  1. HC1Gunner
    Posts : 5
    Windows 7 Professional x64
       New #1

    Discrete GFX Card - No Signal


    Normally I would not bother posting something this simple, but things have escalated, and I'm a bit perplexed.
    This all started with good intentions, I was going to install and play some older RTS games on my AV PC connected to my TV via my AV receiver with HDMI. All was working well, last night I decided I would install an extra v-card I had laying around (AMD 7970) to give the system a boost in graphics. The Asus mobo has built in HD 4200.
    Last night I prepped my 7970 install by uninstalling the AMD drivers for the on-board 4200. After driver uninstall, resolution defaulted to a low setting. I shut down the system, and hit the sack. Today I installed the 7970, only question was to whether I had the proper power connectors, card has one 8-pin and one 6-pin, but power supply only offering (2) 6-pin connectors. Powered on the PC, TV said no signal for HDMI 1, connected HDMI back to the on-board 4200, still no signal.


    I then connected on an extra monitor I have, no signal via HDMI, or DVI from the 7970.
    On a 2nd Monitor I connected via VGA, and DVI from the ports on the on-board 4200, no signal.
    Removed 7970 from the system thinking there might be conflict, connected everything back the way it was before I started this project, and no signal from HDMI to my TV. I can’t even get back to where I started, even though everything is connected same way. I don’t see a post or anything, I’m sure its posting, just no video signal getting out.


    Win 7 64bit
    Asus M4A785-M
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  3. ThrashZone
    Posts : 20,583
    Win-7-Pro64bit 7-H-Prem-64bit
       New #2

    Hi and welcome to SevenForums,
    You'd need another vga cable that has a 8 pin = 2x4 ports to connect to the card.

    Most of these cables are split 3x3+2 or at least evga vga cables are so you can use 6 or 8 to the gpu.

    Possibly enermax your psu manufacture has one for sale or came with the psu still in the box or for sell seperately.

    No telling why your other card will not work now :/
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  4. HC1Gunner
    Posts : 5
    Windows 7 Professional x64
    Thread Starter
       New #3

    Figured it was power connection issue. Probably have a double molex to an 8-pin buried in a box somewhere. Just ordered one online, hopefully that will solve the issue.
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  6. ThrashZone
    Posts : 20,583
    Win-7-Pro64bit 7-H-Prem-64bit
       New #4

    Hi,
    Yep without all the power I wouldn't guess the card would work
    Might be time for a new modular psu then you can get away from molex connections and use real vga cables
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  7. Mellon Head
    Posts : 3,487
    Win 7 Pro x64/Win 10 Pro x64 dual boot
       New #5

    I'm going to ask the stupid question here, and please don't be insulted...

    Did you reinstall the drivers for the 4200 when you put this all back together?
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