Question New GPU not detected by computer when plugged into PCIe slot

[Loidkrone]

I have made a build with specifications i5-12400, Gigabyte GTX 1080, ASUS PRIME B660M-K D4, Corsair RM650x (2016, from old setup) and the GPU is not at all detected by the computer, not even in Device Manager or BIOS. It works when using a m.2 to PCIe adapter, and I have tested other GPUs in the same slot to no avail. The motherboard only has one PCIe x16 slot.
I have tested 3 other motherboards also. Two MSI motherboards don't POST no matter what I do and another ASUS board has the exact same problem.
I have also tested using a different no-name power supply that I had laying around and still had the same problem. Any suggestions?

 

[Aeacus]

Looks like a dead GPU.

It works when using a m.2 to PCIe adapter

In this case, only 4x lanes of PCI-E are used, and not the full 16x lanes GPU can use.

Most likely, the issue is somewhere after the 4x PCI-E lanes, in terms of GPU PCI-E pins.

You can send the GPU in for repairs, since it does show some life. Or RMA the GPU when it has warranty.
For repair shops, Northridge Fix is one of the better ones,
link: https://northridgefix.com

While Northridge Fix is USA based, they accept international shipping and can do repairs worldwide. (If you're located outside of USA.)

Alex, founder and owner of Northridge Fix, often posts electronics repair videos to his Youtube channel, that i find interesting and informative to watch.

Channel: https://www.youtube.com/@NorthridgeFix/videos

E.g MSI GTX 1080 repair;

View: https://www.youtube.com/watch?v=2V5FhaRzVoM


They also sell all and every kind of equipment to do with electronics fixes. Soldering stations, microscopes, flux, capacitors, mosfets, connectors etc.

 

[Loidkrone]

Looks like a dead GPU.


In this case, only 4x lanes of PCI-E are used, and not the full 16x lanes GPU can use.

Most likely, the issue is somewhere after the 4x PCI-E lanes, in terms of GPU PCI-E pins.

You can send the GPU in for repairs, since it does show some life. Or RMA the GPU when it has warranty.
For repair shops, Northridge Fix is one of the better ones,
link: https://northridgefix.com

While Northridge Fix is USA based, they accept international shipping and can do repairs worldwide. (If you're located outside of USA.)

Alex, founder and owner of Northridge Fix, often posts electronics repair videos to his Youtube channel, that i find interesting and informative to watch.

Channel: https://www.youtube.com/@NorthridgeFix/videos

E.g MSI GTX 1080 repair;

View: https://www.youtube.com/watch?v=2V5FhaRzVoM


They also sell all and every kind of equipment to do with electronics fixes. Soldering stations, microscopes, flux, capacitors, mosfets, connectors etc.

Forgot to mention, but the GPU did work completely on an older setup, and I've tested multiple other GPUs in the same slot and none worked.

 

[Aeacus]

and I've tested multiple other GPUs in the same slot and none worked.

Besides GPU, MoBo PCI-E x16 slot is also done for.

but the GPU did work completely on an older setup

All hardware will die at some point. Often without apparent reason. GTX 1080 is 9 year old GPU and it (partly) dying isn't that much of a surprise.

 

[Loidkrone]

Besides GPU, MoBo PCI-E x16 slot is also done for.


All hardware will die at some point. Often without apparent reason. GTX 1080 is 9 year old GPU and it (partly) dying isn't that much of a surprise.

Alright. I was slightly concerned since the PCIe slot didn't even work with the other known working GPUs (before I'd even tried the 1080) and the motherboard is completely new.

 

[80251]

I once had a similar issue w/an old AMD 9700 Pro. My whole Haswell-e system would fail to boot w/the 9700 Pro installed. It turns out the 9700 Pro is PCIe 2.0 compatible and will only work at PCIe 2.0 speeds, which I had to manually set in the BIOS. Your GTX 1080 is PCIe 3.0 compatible while I believe your PCIe 16 slot is PCIe 4.0.

 

[Loidkrone]

I once had a similar issue w/an old AMD 9700 Pro. My whole Haswell-e system would fail to boot w/the 9700 Pro installed. It turns out the 9700 Pro is PCIe 2.0 compatible and will only work at PCIe 2.0 speeds, which I had to manually set in the BIOS. Your GTX 1080 is PCIe 3.0 compatible while I believe your PCIe 16 slot is PCIe 4.0.

Thanks. I'll try this.

 

[Aeacus]

PCI-E revisions are both forwards and backwards compatible. So, this shouldn't be an issue.

E.g PCI-E 4.0 GPU (RTX 4090) is very well capable of running in PCI-E 1.1 slot, albeit at reduced performance.
Further reading if interested: https://www.techpowerup.com/review/nvidia-geforce-rtx-4090-pci-express-scaling/28.html

 

[triplex1]

Thanks. I'll try this.

I would say that the currents of the Corsair RM650x are not enough to start your system.
Can you list all the parts one by one from the old system that the 1080 card was running?

 

[triplex1]

In no case does the PCIe port have anything to do with the card.
Whether it is 4.0 or 3.0 the card should work, so it has nothing to do with the motherboard

 

[80251]

In no case does the PCIe port have anything to do with the card.
Whether it is 4.0 or 3.0 the card should work, so it has nothing to do with the motherboard

Really? Try plugging an AMD 9700 Pro (a PCIe 2.0 part) into a PCIe 3.0 or PCIe 4.0 slot and see what happens.

 

[COLGeek]

What PCIe version is set in the BIOS? Manually lowering may be needed.