HELP! Black Screen with new Graphic card? 7870

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emigear

Honorable
Jul 25, 2013
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10,510
Hi Guys,

This is driving me crazy.

I bought an HP PC last year which I have upgraded a few parts in, current configuration is:

Motherboard: Intel H61 Chipset (std)
Power Supply: Corsair GS600 Watt (upgraded)
Ram: 8 GB (std)
Processor: i3-2120 (std)
Graphic card: HD 7770 (Upgraded)

Now everything was running fine with the 7770, but I decided I needed a bit more FPS, so I bought a Gigabyte 7870 OC.

Took out the 7770, plugged in the new card. Both PCI-E cables etc. (everything 100%, it's fitted correctly, the monitor is plugged in etc. So please don't ask about this stuff). but when I boot the PC all I get is a black screen.

Strange. I plugged back the 7770 and everything worked as it should. Tried again with the 7870.. Black screen.. I thought, ok card must be DOA, so I ordered a second card, this time a Club3d Joker XT 7870.

Same exact thing.. Just a black screen. The PC turns on, all fans are running, but monitor shows no display.. When I plug back the 7770, everything works again..

This puzzles my mind. What the h*** is wrong here?
 
Solution
delmetor
Generally, the running priority of any PC is:

1) VGA Card
2) Integrated Graphics

It's probable that the problem lies in the PC, since it doesn't detect the installed VGA, turning to Integrated Graphics.

Try plugging the monitor cable to the motherboard and tell me what happens.

If the screen is shown, then you should disable the integrated graphics and reboot.
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idkwho

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May 28, 2013
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Since you have a OEM PC you may need to reset the bios. Unplug and remove the 7870, reset the bios either by taking out the motherboard battery, and while doing that, install the 7870. Also, if you haven't already done so, uninstall all previous drivers from the 7770 then reinstall once 7870 is fitted. You should try uninstalling drivers first before resetting bios if it hasn't worked.
 
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delmetor

delmetor

Honorable
Jan 17, 2013
162
0
10,710
Generally, the running priority of any PC is:

1) VGA Card
2) Integrated Graphics

It's probable that the problem lies in the PC, since it doesn't detect the installed VGA, turning to Integrated Graphics.

Try plugging the monitor cable to the motherboard and tell me what happens.

If the screen is shown, then you should disable the integrated graphics and reboot.
 
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