[SOLVED] No feedback on dedicated graphics card

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ineedferrets

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Dec 25, 2012
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I realise the title suggests this should be on Graphics and Displays but both my card and my display work. I found that my motherboard is the source of the problem.

Integrated works when dedicated card is not plugged in.

Please help! Been at this for 8 hours straight now with little to no results.

I am using an ASUS P8Z77-v with a AMD HD RADEON 7970 card.
 
Solution
mauller07
so did the dvi to hdmi cable work fine from the dedicated card, just a little confusing what your saying?

but using the hdmi port from the card does not work?

just want to clear that up first.
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ineedferrets

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Dec 25, 2012
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Yes, both are plugged in securely. It starts up and beeps as it should and all led's go off as they should. After a minute, the red led on the front turns off and remains off whilst the pc still runs.
 
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mauller07

mauller07

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Mar 28, 2010
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how are you connecting your monitor? if its by VGA and the card has 2 dvi ports change the dvi to vga adapter to the other port as only one of them is a DVI-I port that will output a VGA signal.

check if while the card is in if your integrated graphics are still being used, you may have to manually disable it, if it still does not work then update the bios on your motherboard incase its a compatibility problem.
 
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ineedferrets

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Dec 25, 2012
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I was using the DVI-I port with a cable going DVI to HDMI which worked fine. Then I changed to HDMI to HDMI which is what I'm trying to do now. I'm connected to a tv screen (which works fine when I just use the integrated card).

Neither the integrated card nor the dedicated card give a signal when the dedicated card is in the computer. :/
I'll try and download the new BIOS but my internet on the computer is pretty rubbish so I'll try.

Anything else in mind? :)
 
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ineedferrets

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Dec 25, 2012
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Exactly :) sorry to confuse
 
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ineedferrets

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Dec 25, 2012
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After 13 hours of troubleshooting and frustration, I think I may know the problem.

Since the integrated card works when the dedicated card isn't plugged in, neither works when it IS plugged in and the BIOS is set to use the PCIe port and the computer has disabled the Intel HD 4000 graphics I think the problem is the PSU may be damaged and needs replacing. I am going to take it to either PC World or Maplin and see if I can try another PSU and see if it works.

Does this sound plausible, Mauler? I'm sure your far wiser than I am with this :)
 
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mauller07

mauller07

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so a dvi to hdmi adapter works from the dedicated card when its in the machine but the hdmi out on the dedicated card does not work when the machine starts?

if this is the case then the card is working and so is your psu.

the hdmi is probably not a primary output on the card when the card is booting so it may not display anything, if you use the dvi to hdmi adapter till you get into windows, plug the hdmi cable into the dedicated card to the tv on another port and see if windows recognises the hdmi output, unplug the dvi cable and try using the hdmi output once windows is loaded.
 
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ineedferrets

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Dec 25, 2012
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That's good :)

How can I check the outputs on the graphics card? Do I go on display?
 
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ineedferrets

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Just tried using the DVI adapter and the screen is still black. Should I go on the integrated card and use that to check the display and see if the dedicated card HDMI or DVI slot shows up?
 
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mauller07

mauller07

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im thinking that your graphics card does not like your tv, some devices are made to the hdmi specification more stringently than other and this can cause compatibility problems when they handshake over hdmi and one device fails the handshake, this does not occur with the dvi ports which is why the dvi to hdmi cable works.

try using a different tv or monitor with the hdmi output and see if it makes a difference.
 
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ineedferrets

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Dec 25, 2012
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Okay, as long as I don't have to replace anything I am happy :)
I have a monitor kicking about which I can test, I'll do that tomorrow when I get the chance and let you know how it goes :)
 
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ineedferrets

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Dec 25, 2012
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It's working now...
After 13 hours of frustration two days ago, I leave it for a day and decide to turn it on this morning and try and do some more work on it and it just... worked. Just stuck on the loading OS screen now so another problem to solve haha
Thank you for helping though Mauller, much appreciated :)
 
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pegleg1960

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Aug 10, 2013
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If your Integrated video works and the computer boots fine then I would suspect either the Graphics card or a power issue. Here is what I would do.
1. Make sure you are hooking up your display to the proper location on the Graphics Card and not the Motherboard output.

2. Make sure that you connect a power source to the Graphics Card if required.

3. Use a PSU calculator and do a power consumption estimate.

Your PSU may not be supplying adequate power for the new Graphics Card.
 
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pegleg1960

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Aug 10, 2013
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The first thing that comes to mind for me is the initial setup in BIOS. I am not sure but I believe you will need to make changes in BIOS(system setup) when changing from onboard to any PCI or PCI-e based graphics. You want to disable the Onboard Graphics and Enable the Video Card. Also make sure your monitor is connected to the new Video Card and not the PC's Motherboard Graphics Port. Of course you also need to install the very latest updates for the driver's. This seems to be a common issue with newer, high power cards. As others have stated, make sure your new card has all electrical power connections properly installed. Check your PSU. My MSI 7950 has a need for two additional power connections directly from the PSU.
 
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