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gtx 780 no signal

#31Darkblade9116(Topic Creator)Posted 8/3/2014 11:10:03 AM
N3xtG3nGam3r posted...
After doing a fresh windows install you said it's not recognizing the card at all. For some reason sometimes upon a fresh install all of the typical drivers that should be installed to begin with won't be. I had this issue when I went from x86 to x64. I had to re-install all the drivers for my mobo and then had to go into device manager, and mess around with things in there, like enabling/disabling a few things to reset them. Also, I couldn't use my Ethernet controller when I did the fresh install, so that complicated things. Normally windows update will take care of everything (normally), but in my case I had to download everything to a USB drive and install it that way.

Can u give details on the PSU, single or dual rail, max watts and brand. What 780 is it? You probably need a 650+ watt single rail PSU for a 780. If it ends up being the card I would switch to an EVGA one if it isn't already. Returns and step up program for EVGA, plus the quality of their products and customer service make them one of the best nvidia vendors. They never skimp on performance either. You normally get the best of the best in terms of the GPU components with EVGA.

[EDIT]: it could maybe be the PSU. Typically a faulty PSU will cause the computer to just shut down or reboot altogether when the GPU kicks on and starts using an adequate amount of power. These top tier cards definitely use a good amount of power.

Check this. Some cards 770 and higher I think will use one 8 pin connector and some use one 8 pin and one 6 pin. Make sure the proper connectors are plugged into the card correctly. I think my 770 uses two 8 pin connectors (the connectors themselves are 6 pin, with an extra loose 2 pin plug that snaps to the 6 pin connector to make it 8) but will still work with 8/6 combo. Another thing is that most power supply's have specefic PCI-e connectors that are to only be used for the GPU, which can be confused with another set on the PSU (mine was this way). Even though the connectors are the right size, the actual wiring for the connectors might not be capable of pulling enough power from the PSU for the card, hence why the right ones (normally) are labeled PCI-e. If they are not labeled, try a different set of the same type of connectors.


Thanks for the reply, it is very helpful. My psu is a lepa b700m +80 700watts, the card is an inno3d ichill herculeZ x3 ultra gtx 780 (i chose that one because inno3d overclocked it pretty high at default)

Indeed my card needa an 8 and 6 pin connevtor, both were connected properly
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#32N3xtG3nGam3rPosted 8/3/2014 8:26:26 PM(edited)
Ok, my next method if i were you would be this:

Take out your GPU, and use the on-board integrated graphics. Install the drivers for that, etc, set everything else up that needs to be set up, and then shut down, hook the GPU back up, and set it back up.

Also, i think the GTX 780's come with a dual, or triple bios. Make sure the card is set to the first switch (BIOS 1), and if it is, then try switching it to the second slot (BIOS 2), if there is a third slot for the switch, leave that one alone (PC needs to be off to switch those btw). You may also need to go to the vendors site, and download software to flash the BIOS so you are able to use the multiple BIOS', if in fact your card is capable.

As you said, they OC'd the card fairly high for default, there may be a problem with how they tuned the card. Perhaps get MSI afterburner, or Precision X from EVGA and try downclocking your card to the typical clock speeds of the average 780. If that doesnt help, then there is probably something else wrong with the GPU--bad connection, faulty silicon, etc.

Other than my first post and this one, unless i have the PC in front of me and can mess with it, i cant think of anything else. Hope this gets you pointed in the right direction.

[EDIT]: Just checked the clocks for the standard nvidia 780 and your card. While you have more than adequate cooling (and with it taking up 3 slots for the heat sink, and 3 fans a high OC should be a cake walk) i would still downclock it to stock speeds. Your card is OC'd like 200MHz+ on both the core clock and memory clock.

Your 780:

Core: 1,046
Memory: 6,200~ (effective)


Stock 780:

Core: 900
Memory: 6,000~ (effective)


Try dropping it into that range, and see if it makes a difference. Again, you'd have to probably get all the software to set it up by using the integrated chipset to display the picture. Then after you've got everything set up, put the card back in and try the downclock.
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#33KnifegashPosted 8/4/2014 5:00:17 AM
Don't forget to do the basics.

Have you tried using a different HDMI cable? Have you tried using another output on the card?
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#34Darkblade9116(Topic Creator)Posted 8/4/2014 6:48:38 AM
N3xtG3nGam3r posted...
Ok, my next method if i were you would be this:

Take out your GPU, and use the on-board integrated graphics. Install the drivers for that, etc, set everything else up that needs to be set up, and then shut down, hook the GPU back up, and set it back up.

Also, i think the GTX 780's come with a dual, or triple bios. Make sure the card is set to the first switch (BIOS 1), and if it is, then try switching it to the second slot (BIOS 2), if there is a third slot for the switch, leave that one alone (PC needs to be off to switch those btw). You may also need to go to the vendors site, and download software to flash the BIOS so you are able to use the multiple BIOS', if in fact your card is capable.

As you said, they OC'd the card fairly high for default, there may be a problem with how they tuned the card. Perhaps get MSI afterburner, or Precision X from EVGA and try downclocking your card to the typical clock speeds of the average 780. If that doesnt help, then there is probably something else wrong with the GPU--bad connection, faulty silicon, etc.

Other than my first post and this one, unless i have the PC in front of me and can mess with it, i cant think of anything else. Hope this gets you pointed in the right direction.

[EDIT]: Just checked the clocks for the standard nvidia 780 and your card. While you have more than adequate cooling (and with it taking up 3 slots for the heat sink, and 3 fans a high OC should be a cake walk) i would still downclock it to stock speeds. Your card is OC'd like 200MHz+ on both the core clock and memory clock.

Your 780:

Core: 1,046
Memory: 6,200~ (effective)


Stock 780:

Core: 900
Memory: 6,000~ (effective)


Try dropping it into that range, and see if it makes a difference. Again, you'd have to probably get all the software to set it up by using the integrated chipset to display the picture. Then after you've got everything set up, put the card back in and try the downclock.


I tried that first method of yours, still no solution. However that gpu bios setting sounds interesting. How do i set the gpu bios? And the third method won't work if my card isn't found haha
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Born to bleed, fighting to succeed
#35BuyersRemorse55Posted 8/4/2014 7:52:43 AM
don't you have tech support from where you bought the pc?
#36Darkblade9116(Topic Creator)Posted 8/4/2014 8:42:34 AM(edited)
BuyersRemorse55 posted...
don't you have tech support from where you bought the pc?


I bought it from a guy who works at a pc store. I chose every part and he assembled it and tested it. He knows a thing or two about it. Either its the card, motherboard or the psu
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Born to bleed, fighting to succeed
#37WyzeGyePosted 8/4/2014 9:32:44 AM
WerdnAndreW posted...
I think the card is busted. Need to return it.


Took this long to say the correct answer?

Gfaqs, I am disappoint
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