5080 Not Detected

[vanmaster]

A few weeks ago I got a Palit RTX 5080 GamingPro from OCUK. After installing, I just could not get an output from it - I tried many things as suggested on various forums, such as changing PCIE to Gen4, disabling iGPU, CSM etc. I reseated the card a number of times, checked the power cable - even switched from using 12V-2x6 that came with the PSU to using the splitter cable that came with the GPU. Nothing worked, so I contacted support and returned the card for testing.

They checked the card on an Intel X890 system and it worked fine on all outputs. My system is an AMD X870E system, and I still can't get any output from it. It's like a Jayztwocents video I watched when he showed a non-reference 4090 in their early days that didn't work on an Asrock Taichi motherboard, but the FE card did work. As in my case, for him the system boots fine but when checked using the motherboard HDMI, the card does not show up on Device Manager. The GPU lights up, and fans spin.

As I said, I've tried many of the normal things people suggest, resetting CMOS, even done a clean install of Windows 11. Those didn't work, and now I've got my 1070 installed again which is working fine.

Has anyone got any advice for this? My support ticket has gone quiet since my last question 72 hours ago.

My set up is:
Asrock X870E Tachi
AMD Ryzen 9900X
Antec HCG 1200 Pro Platinum ATX3.1 PSU
G.Skill Trident Z5 Neo EXPO RGB 64GB

 

[vanmaster]

As you've already tried to get it working yourself, I'd have returned it under 14 day DS to negate any 'works fine here' on a different setup than yours and bought an alternative GPU.

I was hoping support might show some support, but since they found it to work on a different type of system they've gone quiet. Since my last question on that ticket 72 hours ago, I've seen the ticket get assigned to someone and then unassigned.

 

[vanmaster]

Tried switching between HDMI and DP cables (resetting monitor too)? Monitor cables can be surprisingly fickle

Yes, I've tried different HDMI cables too.

 

[vanmaster]

have you tried another GPU (to verify if the motherboard slot is not broken).

Also, maybe bios: turn off onboard graphics?

I have my 1070 installed right now, using the latest Studio Driver (576.02), and I've tried disabling iGPU.

 

[vanmaster]

The Jayztwocents video can be found here - previous series of card, but interestingly on an Asrock Taichi motherboard. It just seems very similar to what I'm experiencing now with a non-reference 5080.

By the way, I do have the latest BIOS installed (3.20 at time of writing), and latest chipset drivers from AMD.

 

[vanmaster]

How old is the motherboard? I would look at RMA'ing that and getting something else.

I got the motherboard mid-November, so 5½ months.

Only other thing to try is:
Take the 1070 out and get your system working with the integrated graphics on the CPU, using the motherboard HDMI output. Remove all Nvidia drivers and including the Windows drivers.
Once you have that working, install the 5080, but keep the HDMI cable connected to the motherboard.
Does the 5080 show up in the device manager under hidden devices?

When I did a fresh install of Windows 11, that was done with no GPU installed so therefore no Nvidia drivers. Tried the 5080, and again it did not show up on Device Manager - including under hidden devices.

 

[vanmaster]

PS. I know it sounds daft (and I don't mean to patronise you) but make sure the 12v connector is pushed firmly home and the card is locked in the PCI-E slot (new cards are so huge it is difficult sometimes to see if they're correctly seated).

Yes, I tried both cables and seating multiple times before raising the support ticket.

 

[vanmaster]

Did you get the motherboard from the same place as the GPU? If so, maybe send both back and see if they can get it working with your board. If they can't, then it's not fit for purpose and they'll need to work with you to find an alternative.

Motherboard, CPU, RAM, GPU, PSU were all bought from OCUK across 4 orders starting mid-October.

 

[vanmaster]

I have got things working now! However, it did take a change of motherboard to do it.

As I suspected, the Asrock Taichi motherboard seems to be the issue - perhaps when they next update the BIOS it will solve things. I'm now using an MSI MPG X870E Carbon motherboard, and it found the card straight away.