My GTX 760 is not Displaying

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Darn_Buntley

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Jul 22, 2014
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I've been struggling with a very peculiar issue regarding my PC. I need to start from the beginning so you can thoroughly understand the problem I'm having.

It all started when I was away on a trip. Whilst my brother was playing a video game on my computer, a piece of hardware started malfunctioning, I guess (I wasn't there, so I can't know for sure). The fans on the graphics card started spinning much faster and more loudly and the screen went blank. In a panic, he shut the PC down. Upon attempting to reboot it, the monitor only yielded a black void. Eventually, after consulting my other brother and my dad, he plugged the video cable into the motherboard rather than the graphics card. The computer started as normal with seemingly no issues. However, now that the video cable is plugged into the motherboard, the computer uses the native Intel 4000 series GPU instead of the PCI-e-installed one. Herein lies the issue: I kind of want to use my ~$250 Nvidia GeForce GTX 760 in my computer.

When I returned from the trip, I was pretty confused. Everything else was working properly apart from the graphics card, so I did hopefully what any geek in love with his computer would do: contact EVGA, the manufacturer of the card. They told me to test the card in another system, but I didn't have one available to me. Impatiently, I just sent the card back thinking it was the source of my dismay. Very unfortunately, however, the card I received back from EVGA still yielded no results.

I am very confused as to what the issue might be. I've gotten ideas from various technical support lines that it could be the motherboard or the power supply unit. I'm not sure how that could be possible, however, considering my PC works completely fine if you don't hook that particular graphics card into it. Knowing that, I thought maybe the PCI-e port was malfunctioning, so I tested an old graphics card (Nvidia GeForce GT 620) I had laying around. It worked perfectly. Seeing that, I concluded that it was the power supply that just couldn't handle the huge 760, since it has to be plugged into the power supply and the motherboard, where the 620 only needed the motherboard connection. Although, after checking the wattage of my power supply, I debunked that theory; the power supply is a 700 watter, more than enough to power the card.

I am left at a complete loss as to what is happening. If you could provide any input, I would be very grateful.


Computer Specifications -
________________________
Processor: Intel Core i5-3570K CPU @ 340 GHz (4 Cores)
RAM: 8.00 GB
Video Card (current/motherboard): Intel HD Graphics 4000
Video Card (desired): Nvidia GeForce GTX 760

Operating System: Windows 8
 

Xtinction

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Mar 21, 2014
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First of all, great OP.

OK so basically it seems like your GFX card is no longer being recognised by your system. I have a few hunches:

1. Something with the PSU not supplying power to the card directly through the 6-pin connectors, this could be a faulty wire or something, not necessarily having to do with the wattage it provides.
2. Is it possible to force your pc to use the intel integrated graphics while your vidcard is in your system? I'm very interested in seeing if the card is "seen" by the system at all. It just feels to me like the system is completely unaware of the graphics card's presence. Are the fans on it spinning? (that would at least show that it's powered :p


 

Darn_Buntley

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Jul 22, 2014
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Thank you haha.

1. That's possible. Hopefully it's just that simple.
2. Yes, it is. I can have the graphics card installed into the system and just plug my DVI cable into the motherboard and it will boot normally using the Intel graphics card. When I do that, though, the fans spin wildly, and they're very loud and obnoxious. So I opt to just leave the card out most of the time. Also, interestingly enough, if I just plug the card into the PCI-e port but not into the PSU, it displays the "plug your freaking card into the the power, you dumb" message (rough translation). So the computer knows the card is plugged in at that juncture.
 

Xtinction

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Mar 21, 2014
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Hmmm ok. So Can you now attach your DVI to your motherboard, put your card in, try to ignore the 100% fan speed, and check to see if you can find your card in device manager?

If you put in your vidcard, can you boot into windows (see the hdd led blink etc)? If you replug your DVI into the motherboard while windows is running and you suddenly get stuff on your screen, I think it proves that your vidcard isnt being used. You might want to try to force your onboard video to not be used in the BIOS.

I take it you tried all the video-outputs on your card? (it shouldnt really matter, but you never know)

And finally: the best thing you can do now is check to see if your vidcard works in another system, just to make 100% sure you weren't unlucky twice.

 

Darn_Buntley

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Jul 22, 2014
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I am currently running the computer with the card installed. The fans are going, of course, so I know it's getting power. It does not show up in device manager, however. It only shows the Intel HD 4000.

Yes, I can. I just did that. I turned the computer on with the video cable inserted into the 760 and got no visual. I left it sitting for a while then plugged the cable back into the motherboard. Windows had started as normal, I just couldn't see it on the monitor when it was plugged into the card. Also, I looked through my BIOS, but I didn't see an option to disable the on-board graphics.

BIOS: American Megatrends Inc. V1.3 (according to systemrequirementslab.com)

I just retried all the video outputs I have (DVI and HDMI). The card itself has no VGA port.

But yeah, I'm not sure if I have access to a system. My brother has a good PC to test, but the card is too large to fit in his case haha. I'm hoping my dad's computer will be a suitable host, but I have yet to test it. I plan to go over in a while to do some testing there. Maybe later I'll take it to a local computer repair place if all else fails.
 

Darn_Buntley

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Jul 22, 2014
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I finally gave in and took it to a computer repair person. The problem was with the power supply, specifically one of the Molex connectors. All is well now, though.

Thank you, Xtinction, very much for helping me.
 

Syahrl

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Jul 14, 2016
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HI, can u state what the problem on Molex connector in details, I have issues just like yours using the gtx760. It the PSU not enough power to power or others
 
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