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Monitor won't recognnize my computer after installing graphics card.

Tags:
  • Computers
  • Graphics Cards
  • Monitors
  • AMD
Last response: in Graphics & Displays
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December 12, 2013 4:19:01 PM

I recently bought a Powercolor hd 7790 from Newegg and put it into my Dell XPS 8300 computer. The computer starts up but my monitor says it does not have a signal or recognize my computer. I uinstalled the AMD 6450 catlyst drivers before turning off the computer and putting in my new Graphics card. It does start up and im wondering if im having a DVI/VGA adapter problem or i dont know whats wrong wih it. HELP

More about : monitor recognnize computer installing graphics card

a b U Graphics card
a b C Monitor
December 12, 2013 4:24:53 PM

Well, its not the drivers, since it happens before the drivers are loaded and used. So, you can count that out.

Your assumption is probably correct, but are you using the same cable that you used before the upgrade? What is different, just the adapter?
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December 12, 2013 4:27:16 PM

I used to run on jus a VGA cable but I plugged in a DVI to VGA adapter and plugged the VGA on top of that. I'm not sure what's wrong.
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a c 254 U Graphics card
a b C Monitor
a c 104 À AMD
December 12, 2013 4:28:11 PM

Did you previously have a graphics card or were you using the integrated graphics ? Did you change the monitor cable from the motherboard port to the graphics card port?
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a b U Graphics card
a b C Monitor
December 12, 2013 4:30:44 PM

Try swapping in a known working PSU.
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December 12, 2013 4:32:12 PM

I was using a Radeon HD 6450 before putting this in. I unplugged the VGA from my old graphics card.
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December 12, 2013 4:32:46 PM

anonymous1 said:
Try swapping in a known working PSU.


I don't exactly have a fresh PSU lying around.
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a c 254 U Graphics card
a b C Monitor
a c 104 À AMD
December 12, 2013 4:38:49 PM

If you put the old card back in do you get the display to work ? You should have a 500w PSU in the computer and a 6 pin cable connected to the video card.
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December 12, 2013 4:46:18 PM

I've heard around this site and from a friend that my 460w PSU is more than capable for this card.
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a c 254 U Graphics card
a b C Monitor
a c 104 À AMD
December 12, 2013 4:56:03 PM

I had looked at the specifications of the card and the 500w PSU was listed as a minimum requirement. The 460w will most likely power the card as long as it's putting out the amps that the card needs. You do have the 6 pin cable connected to the card ?

Dell computers are notoriously hard to change components , I've had a few and trying to upgrade or fix them is what prompted me to start building Pcs myself.

With any computer you should be able to change a video card without any trouble.
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December 12, 2013 5:00:16 PM

Yes I do have the 6-pin plugged in. so what should I do?
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a b U Graphics card
December 12, 2013 5:06:27 PM

if your 460W psu is generic then it cannot support a 7790

my friend has a cx430 running a hd 7850..
i think your mobo needs a bios update first...
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December 12, 2013 5:11:34 PM

When I open up my computer the graphics card seems to be running perfectly... it's just that my monitor doesn't recognize my computer.
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a b U Graphics card
December 12, 2013 5:27:52 PM

its not your monitor
your pc is not sending signal to your monitor because something is wrong inside your cpu system
1. update bios
2. make sure your psu is not generic and can support the card
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