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Motherboard not detecting Video Card (I think)

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  • Graphics Cards
  • Motherboards
  • Graphics
Last response: in Graphics & Displays
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September 10, 2014 3:55:39 PM

I think my motherboard is not detecting video cards for some reason. It was working fine before, don't know why it would have changed. Story from beginning: So, I just bought a new case and switched all my parts except for the graphics card and psu because I was getting new ones from my cousin. But, it was taking awhile for my cousin's stuff to ship, so I just built the computer with the old psu (psu means power supply) and graphics card (card was asus gtx 560 ti). When I put it together, it started up, the LED's turned on, but no signal from the video card. I know it had power because there was a green light on it which means it has power. So, I just waited until my cousin's stuff got here and when it did I put it in (his card was HD 5970) and the same problem persisted: no signal. I knew it had power this time as well because the fan spooled up. The new psu is a coolermaster 750w. please help me.

More about : motherboard detecting video card

a b U Graphics card
a b V Motherboard
September 10, 2014 4:05:49 PM

Most common problems are:
1) Power connections (24-pin power and the CPU power (either one 4-pin connector or one 8-pin connector), fans connected to mobo.
2) RAM/CPU not seated properly
3) GPU not seated properly and/or power connected to GPU.
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September 10, 2014 4:16:32 PM

ronintexas said:
Most common problems are:
1) Power connections (24-pin power and the CPU power (either one 4-pin connector or one 8-pin connector), fans connected to mobo.
2) RAM/CPU not seated properly
3) GPU not seated properly and/or power connected to GPU.


Well, come to think of it I think it could be the cpu power because I have 2 4-pins in there. If that were the problem then that would mean something is wrong with my 560 ti. Should I take out 1 4-pin of just add a 6+2 pin?
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a b U Graphics card
a b V Motherboard
September 10, 2014 4:21:16 PM

The PSU should have both a 2 4-pin connector (some mobos use 1/2 the connector, others all 8 pins), and a connector for the GPU....
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September 10, 2014 4:27:33 PM

ronintexas said:
The PSU should have both a 2 4-pin connector (some mobos use 1/2 the connector, others all 8 pins), and a connector for the GPU....


Yeah, I'm kind of new to power supplies so I don't know entirely what that means, if it's any help my psu is a gx 750w cooler master.
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a b U Graphics card
a b V Motherboard
September 10, 2014 4:30:55 PM

It should have both connectors.
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September 10, 2014 5:17:38 PM



Yeah, I checked and I have all those plugged in nice and tight, so I don't know what the problem could be :|
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a b U Graphics card
a b V Motherboard
September 10, 2014 5:23:55 PM

The other things to check is to make sure that all the case connectors (front panel) are properly inserted on the mobo. Make sure you have proper polarity (+ to + and grnd/- to grnd/-).
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September 10, 2014 5:44:39 PM

ronintexas said:
The other things to check is to make sure that all the case connectors (front panel) are properly inserted on the mobo. Make sure you have proper polarity (+ to + and grnd/- to grnd/-).


What would you mean by case connectors, all the cables from the case?
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a b U Graphics card
a b V Motherboard
September 10, 2014 5:47:39 PM

The front panel of the case (i.e. power button, reset button, speaker, microphone, etc.....)
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September 10, 2014 6:27:32 PM

ronintexas said:
The front panel of the case (i.e. power button, reset button, speaker, microphone, etc.....)


Yeah, those are plugged in...
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!