Topic: NVIDIA Founders Edition - 8-Pin Power Issue? (Read 183 times)

This. Why indeed is one of the dividers broken?

I should have been more specific.  When I said burned cables, it was actually the plug at the power supply getting hot enough to melt and darken the wires at the plug.  When the plug gets that hot, it seems to melt together with the socket and become brittle enough to break when you unplug it.  That’s what I figured happened to the socket on your card.

I was lucky.  I had one card behaving erratically and found the problem when I removed it and the cables.  Afterward, I checked my other machines for signs and found the darkened wires, so I’ve been replacing them.

For reference, my power supplies were all Seasonic 1000 watt platinums with the 14 pin to 2x 6+2 vga.  I recently bought a new Seasonic and they have changed the vga cable plugs.  I thought it was coincidence, but maybe not.

If you’re handy with a soldering iron, you can get replacement sockets.  IIRC, they’re molex 8 pin mini-fit jr.  Also, some overclockers solder leads directly to the card and ditch the sockets completely.  Others here might be able to help you more in respect to these options.

The broken divider if thats what you are referring to and thats what im actually seeing in the pic isnt going to keep the card/connector from working.  However what caused that divider to be broken could be a 8 pin plug was installed backwards and forced.

OP  I need a better aerial view looking down into that connector that is in focus.  That pic appears to show the connector has what is called a pushed pin(s).  If a plug is inserted wrong or even just forced too quickly it can break the lock that holds the pin within the cavity of the its socket and if that happened then the solder joint to the board is broken.  Remove the fan shroud and inspect the board side opposite of the 8 pin socket.

No body noticing damaged 8-pin connector?

theodrim: Thank you for the diagram, if this turns out to be the cause of the problem I hope you will help me reach the solution.  I'll upload a picture.

leonix007: I will upload a picture of a fully working GPU next to mine with the 8-pin power cable plugged in.  Maybe that will help people tell the difference.

m.vina: It’s not just the lights.  The lights became dim after it stopped working.  I assure you, if it was still mining I wouldn’t have made a big deal out of it.

Dotem: I have tried it under 3different motherboards.  I’m curious now, because if you’ve burned vga cables I think it would be possible to burn the port.

Ciscopro2000: I have tried it directly on a pci-e x16 slot and a good 8-pin power connector.  I have tried multiple risers as well, and have narrowed it down to the GPU.

Thank you everyone for the help and suggestions.

whoismoses: I have tried it as the only card directly into the motherboard and on a riser.  Onboard graphics posts, but not the video by any output source.  The BIOS won’t read the card at all.  I haven’t tried with a different cable than SATA, but I can absolutely try with a 6-pin or maybe a MOLEX.  If this works, I will need your wallet address.  Yes, I have verified the cable by using the same power cable and PSU on another card, which worked fine.  The 8-pint port is broken but I’m not sure why.  I have a total of 3 rigs running, and that may have happened when I was moving the cards around between the rigs.  It connects securely, but I included the picture in case this is the reason it doesn’t function, what I believe to be the most likely explanation.

heodrim: Yes I have separate rigs running, and this card doesn’t work in any of the motherboards anymore.  I will try to discharge the capacitors with your step-by-step instructions and if this works, I will need your wallet address.  I thought the LEDs were just dim as an option, but the lights were running full blast until the card stopped working.  As a test, I have tried other cards using only PCI-e powered risers and get the same dim lights.  The working cards also do not post when only connected by PCI-e risers.

remauto1187ma: This GPU is one of many.  I have tried it as the single GPU on the motherboard and tried it as one of many GPUs on the motherboard with the same result.  This card is the only one that does not read in BIOS or in ethOS.  I have swapped the power cable for other functioning power cables and got nothing.  No, only the cables that came included with my Corsair HXi series PSUs have been used.  The measuring of ohms is something that I have not tried or even considered.  I will order an ohmmeter and get back to you on this.  If this leads me to getting it working, I will need your wallet address.

I would connect the Gpu directly to the pcie 16 slot and cable a known good 8-pin power connector to eliminate the risers as the problem.  Maybe you have a bad gpu. 

Swap out the power cable to the card and check the 8 pins at the card and at the power supply. Should probably check the mobo atx plug and pins as well.  In the last few months, I’ve burned multiple vga power cables on machines that were fine previously.

Failing that, swap the card to a known good slot / power position and see if it works.

All this fus over some lights eh? Sounds like a profitable mining rig.

Anyway, i've had some GPUs with dim lights as well. This can't be avoided esp. when the GPU is already old and worn out. I'm guessing the actual LEDs are to blame and could possibly need replacing. So either bring them to the shop and get an RMA or pay for replacements lights or something.

If you go this route can i get the 0.1 ETH? Ha.

Lol, the OP says


He has other cards for comparison, so basically he knew the 8Pin should be connected in PSU however, just in case, its too good to be true, and a great help if OP can send us the picture with the 8pin PCIe cable connected to GPU, we are all human after all

With no 8 pin gpu plug this gpu never working.

It sometimes helps with similar issues.
Bunch ceramic and little electrolytic.
Yes, store some power. Doesn't see how this is related to topic.

There is two sensing pins three +12v and three grounds.

Anyway, if you are out of warranty period/rma, you may want to inspect you card closer like remauto1187ma advice. For starters, removing backplate and measuring if there are +12 on pins in red:
https://preview.ibb.co/kR57qS/nvidia_geforce_gtx_1080_internal_Back_SLI_removable_airflow_section.jpg

Why would you need to "discharge the capacitors"?  Which ones?  Do you have any idea how many caps are on a GPU?  Do you even know what they do?

With Dim LED's Symptom there are only 3 possibilities here.  One is that you simply arent getting enough power to the 8 pin socket on the GPU.  Is this GPU the only one being powered by the power supply?  If it isnt then disconnect one that is working and connect ITS 8 pin cable to the pain in the ass GPU that isnt working.  Does it work now?  If it does then you either dont have a large enough power supply OR your original cable feeding the pain in the ass GPU is no good which leads us to possibility 2.  Did you mix cables from another brand or even generation of power supply?  Ring the ends out with a ohmeter and compare to a working cable to verify.  Then possibility three is that you have a short or open in the pain in the ass GPU.  Shorts definitely cause dim LED's.  Ohm out with a ohmeter from hot side of 8 pin socket to ground side and what resistance do you see?  A open on one or more of the hot or negative side connection to the pin socket will mimick a short also as far as the dim LED symptom and simply not working.  You may have to remove fan shroud to get a better look.  Look for dark or burnt spots on the circuit board of the card around the 8 pin socket. Poor solder connections can cause failure of the joint connections on the board.  Sometimes this type of failure will even burn the traces coming from the 8 pin socket which route power to throughout the rest of the circuit board of the GPU.  4 of those pins are 12v+ and the other 4 are 12v-.   If there is any kind of board failure it will usually show its ugly head and be obvious when you pop the fan shroud off and inspect the board.  Burnt traces, bad solder joints can be repaired.  SMD (surface mount devices) can be replaced but can be a total pain in the ass without the proper equipment.

Did you test this card on another motherboard and have you tried discharge capacitors from before trying (power off, toggle psu off on the back, press power button, wait minute, power on)?
Also dim light maybe because something with led and it's pcb and not card as a whole.

Have you tried it as the ONLY card in the system? If so, what happened?

Can you power the riser with something other than a SATA power cable?

Also, are you sure the PCI-e power cable is from the PSU you are using?

What does the 8 pin port on the gpu look broken?

Wondering at this point if I can even save the card... the dim green light looks the same as when a card has only pcie riser power going to it. 

Hey Guys,

Been having GPU issues and I don't like the idea of putting it in the over so I figure I'd try this as my last resort.  Can't get my system to read the GPU and I have tried it all from risers, motherboards, pcie slots, etc.  The lights on the card come on in green, but nowhere near as bright as my other cards.  I suspect its not getting enough power from the 8-pin cable, and it only powers on because of the risers being powered.  Anyone have any thoughts or possible solutions on this?




.1 ETH for whoever helps me get the card back up and running!

DR