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No Output from GPU

CEI2020

CEI2020

CEI2020

Associate
Joined
12 Jul 2023
Posts
20
Location
South West
Hi,

I was using my pc this morning for gaming when both of my screens lost signal, the game was still running in the background with audio etc.

I reset the PC assuming it had a funny 5 minutes but still no signal.

I swapped out a HDMI cable from the gpu to the motherboard display and that worked as normal, so assume it’s a GPU related issue.

I factory reset the GPU to see if that would help but still no signal.

A few details

Gpu - Sapphire Radeon RX 7900 XT Nitro+ Vapor-X 20GB GDDR6 PCI-Express Graphics Card

Motherboard - Asus TUF Gaming B650-Plus WIFI (Socket AM5) DDR5 ATX Motherboard

PSU - Corsair RMx Series RM750x 80 PLUS Gold Fully Modular ATX Power Supply (CP-9020199-UK)

All bought new Nov 2023

No issues at all up to this point, only things to note are sometimes my PC enters bios as the boot sequence seems to get lost? And a few days ago the monitor display had some “lines” at the bottom but this went away on its own after a few minutes.

I assume this is a hardware issue relating to the GPU as everything else performs as normal. Another thing to note is the GPU appears in the AMD software with temps, utilisation etc but no output to the screens

I believe I am in the warranty window with overclockers but would like to resolve this or at least understand what happens before fixing it.

All advice is appreciated.

Thanks

Chris
 
Check the GPU is seated correctly & power cables secure, do the fans spin on startup?
Try your other PCIE slot
Try another GPU
Try the GPU in another system

Lines on screen can be an indicator of a dying GPU unfortunately.
 
Last edited:
Rob_B said:
Check the GPU is seated correctly & power cables secure, do the fans spin on startup?
Try your other PCIE slot
Try another GPU
Try the GPU in another system

Lines on screen can be an indicator of a dying GPU unfortunately.
Click to expand...
Thanks for the prompt reply.

The fans don’t spin on startup and I have tried it in another pcie slot and nothing changed, I don’t have another system I can try it in unfortunately. assume GPU has died?
 
CEI2020 said:
assume GPU has died?
Click to expand...

Sounds likely giving what you've wrote, but it could also be the motherboard or power; the only sure way to know is to test it in another system, which unfortunately you can't do.

It's a bit weird it's detecting it in AMD's software though. Does it also show in Device Manager? If so, can you try the following:

1. Put the GPU back where it was in the original slot.
2. Boot into Windows on the motherboard's HDMI port.
3. Go into System > Display > Graphics
4. Find a game from that list, click on it, and choose Options.
5. See if the 7900XT is in the list of options. If it is, choose it for that game and click Save.

After that, boot up the game to see if it runs with the 7900 XT. You should notice as it'll either crash the system, work fine, or your FPS will be potato (as it'll default back to the IGPU).
 
Teaf said:
Sounds likely giving what you've wrote, but it could also be the motherboard or power; the only sure way to know is to test it in another system, which unfortunately you can't do.

It's a bit weird it's detecting it in AMD's software though. Does it also show in Device Manager? If so, can you try the following:

1. Put the GPU back where it was in the original slot.
2. Boot into Windows on the motherboard's HDMI port.
3. Go into System > Display > Graphics
4. Find a game from that list, click on it, and choose Options.
5. See if the 7900XT is in the list of options. If it is, choose it for that game and click Save.

After that, boot up the game to see if it runs with the 7900 XT. You should notice as it'll either crash the system, work fine, or your FPS will be potato (as it'll default back to the IGPU).
Click to expand...
Thanks, I tried that and it booted up with horrible fps so assume it reverted to IGPU.

Device manager shows AMD Radeon TM Graphics, I assume this is GPU only? No other display adaptors are shown

The pc if still detecting the GPU, lights are and was available to select as you described above, but no fans at any point and no output on any of the 4 ports.
 
Last edited:
Photo from AMD software

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Last edited:
CEI2020 said:
The fans don’t spin on startup and I have tried it in another pcie slot and nothing changed, I don’t have another system I can try it in unfortunately. assume GPU has died?
Click to expand...

Have you tested the power connection? Both at the GPU end and the PSU end? The cables need to be firmly plugged in at both ends.
 
Quartz said:
Have you tested the power connection? Both at the GPU end and the PSU end? The cables need to be firmly plugged in at both ends.
Click to expand...
Everything appears well in place, as I said it was working fine first thing this morning, until I wasn’t. No knocks or bumps since
 
CEI2020 said:
Thanks, I tried that and it booted up with horrible fps so assume it reverted to IGPU.

Device manager shows AMD Radeon TM Graphics, I assume this is GPU only? No other display adaptors are shown

The pc if still detecting the GPU, lights are and was available to select as you described above, but no fans at any point and no output on any of the 4 ports.
Click to expand...

Yeah, the "AMD Radeon (TM) Graphics" would be the IGPU from the 7800X3D. The GPU from your screenshot is also the IGPU rather than the 7900 XT. The light strips on your GPU are powered from the power supply's PCI-E connectors (12VHPWR). The power/instructions for the fans are likely coming from the PCI-E slot itself, which is probably why the lights are on but the fans aren't on. Some GPU's don't spin fans up until a certain temperature threshold, which could also explain the lack of fan power; however, given everything you've reported, it sounds like the GPU has died, but I can't think of a way you can accurately confirm this without another system to try to power up your 7900 XT.

Do you have another dedicated GPU you could test in the system? It would help eliminate the motherboard and PSU, leaving only the 7900 XT as the probable culprit, as if there was a power issue from either of the power domains, it'd likely happen with another GPU as well (provided it draws enough power). If you don't, then once you have checked all the basics (looked for loose wires, replaced PCI-E power cables if you have spares, smell-test for burning, etc), then personally I would advise you RMA the 7900 XT.
 
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