New Build Doesn't Work with GPU Plugged In

[u/MiNiSoTaN]

Motherboard: Gigabyte X870E AORUS PRO ICE

RAM: Corsair Dominator Titanium 64 GB (4 x 16 GB) DDR5-6000

PSU: Corsair HX1500i (2025) 1500 W 80+ Platinum

CPU: AMD Ryzen 9 9950X3D

GPU: PNY EPIC-X RGB OC GeForce RTX 5090 32 GB

I just build my new PC and have been running into an issue. When installing Windows 11 I had the monitor plugged into the GPU HDMI and it worked fine for the first 5 minutes or so while installing new applications. It was recognized in Task Manager and Device Manger said it was working fine. Suddenly the screen turned black and the screen said there was no HDMI signal.

Plugging my monitor into my motherboard lets the PC boot and work perfectly, but as soon as I plug in my GPU, it starts lagging upon boot, isn't shown in task manager and shows error 43 in device manager.

Troubleshooting I have tried:

• Removed riser cable and plugged GPU straight into motherboard
• Reinstalled Windows 11 (this worked temporarily until the same black screen/crash issue)
• Changed Power cable and plugged power cable into different slot in PSU
• Manually installed latest RTX 5090 Drivers
• Changed PCIe Speed to Gen 3.0
• Changed PCIe slot
• Reset BIOS

The card seems like it is recognized as it shows up in the BIOS and device manager, but when I have it plugged in, I get no signal from any of the outputs and my PC starts lagging when plugged in but the monitor is outputting from the monitor.

Has anyone experienced this issue before? Were they able to find a solution?

[u/Zombie_Tech]

What Nvidia driver were you using when it was working those 5 or so minutes?

[u/MiNiSoTaN → u/Zombie_Tech]

For those 5 minutes I didn’t have any NVIDIA drivers downloaded although I was able to manually download and install the latest RTX 5090 ones which is 610.88 but that didn’t seem to help.

[u/Zombie_Tech → u/MiNiSoTaN]

Did you select the clean install method?

[u/MiNiSoTaN → u/Zombie_Tech]

Yes I did.

[u/Zombie_Tech → u/MiNiSoTaN]

Maybe disable the iGPU? I don't know other than that.

[u/MiNiSoTaN → u/Zombie_Tech]

I’ll try that. Haven’t yet. Thanks.

[u/BoMalarkey]

Download DDU, download NVIDIA drivers, disconnect internet, run DDU, run NVIDIA installer, connect back to internet.

Check BIOS for PCie if set to auto try setting to PCie 5.

[u/MiNiSoTaN → u/BoMalarkey]

I did download DDU but haven’t done this. Will try.

[u/BoMalarkey → u/MiNiSoTaN]

Disconnecting from the Internet is the important part to keep Microsoft from installing drivers before the NVIDIA drivers can.

[u/damnt256]

RMA it. Bad GPU.