No output through the GPU, only through the mainboard and integrated graphics.
No output through the GPU, only through the mainboard and integrated graphics.
Hey there, I’m trying to figure out this really strange problem. In short: My girlfriend’s PC doesn’t show any signal from the GPU at all, no matter what we try. The issue has gotten worse over time. Used to run smoothly for months—just reboot a few times after a cold start—but now it’s not working. We know Windows boots fine in the background thanks to software like OpenRGB and Fan Control, which eventually load. We’ve tested various GPUs, monitors, cables, even power supplies, different motherboards, RAM, and PSUs. We even tried an AM5 upgrade and connected everything except the minimum setup. The board works in Device Manager and BIOS, but when we connect just the mainboard and the 7600x3d GPU, it functions perfectly. I’ve used a dedicated GPU before, and it was recognized. Hardware specs: Ryzen 5800x → 7600x3d, Asus X570 Dark Hero, AsRock B550 Steel Legend, B850 Livemixer, 32GB RAM, BeQuiet Dark Rock Pro 4 cooler, and a 850W Pure Power 13M PSU. I also swapped out the case, changed cables, tried different power supplies, even moved it to another room. Still nothing. The only thing that works is when we boot into the mainboard with the iGPU of the 7600x3d. It’s frustrating—everything seems to work until we remove something, and then it fails completely. I’m not sure what’s wrong now. What could be causing this?
Welcome to the discussions! It looks like this setup has some unusual behavior. Let's see if we can resolve it together. First, is there a way in the BIOS to turn off the integrated graphics? Also, make sure your BIOS version is current. Second, you mentioned it shows up in Device Manager—have you looked at its properties to confirm the device status is correct? Lastly, have you run a DDU test?
We also refreshed the Bios on two boards since the latest version already includes the update. We experimented with different PCIe slot settings—Gen 1 through Gen 5—to see if it helps. Device Manager reports normal functionality. Drivers were reinstalled, yet the problem persists even without any connected drives. It’s not working at all when using the GPU, as no signal reaches the monitors from start to finish.
We both felt frustrated with our setup. I’m planning to get a prebuilt soon, which is going to be really challenging. Often we end up needing different parts for each machine just to fix problems on one of them. I’m sharing my build so you can see what was done, and I’m curious about what’s behind these issues. One build passed smoothly, but the previous one was a real mess—still facing strange problems even now.
It’s really confusing and I’m not sure what to do anymore. It seems like I’ve tried everything. However, here’s the latest: none of the GPUs are being detected in Windows anymore—not even as unknown PCIe devices. It’s as if they never existed. I’d consider a faulty power supply or a bad slot, but with three mainboards and three PSUs across two platforms, that’s unlikely. I can’t locate any information about them in the BIOS, even if there were in the slot. Since we’ve essentially assembled a completely new system using reliable components, I don’t think just replacing everything and buying a prebuilt unit would solve the issue.
It really isn't great. To pinpoint the issue, you'll likely need a functional computer first, then gradually replace components, test each time, and continue until you find the source.
We possess a unit with its own components, which feels unusual. I once thought a PC issue might be affecting parts differently—my system functions normally, while hers doesn’t.
We received a fresh mainboard, the Gigabyte B850 Gaming X Wifi, as that was what was in stock locally. We tried a basic configuration outside the case—CPU, cooler, one RAM stick, and the GPU—and the system ran fine with my GPU installed. After swapping back to her 6700xt, no signal appeared, but the VGA LED lit up. When we switched to my confirmed 6900xt, the picture came back and I could access the BIOS. I decided to buy a new GPU and gave my 6900xt to her. We reassembled everything again, reinserted the SSDs, but still got no signal; the VGA LED remained active. Removing the SSDs didn’t help. The board now doesn’t recognize the GPU or shows another issue. A friend mentioned many Corsair MP600 SSDs failing in their machines and sometimes removing NVME/PCIe slots, which might be relevant here. I’m not sure if that’s the cause, but I ordered a spare SSD just in case. I double-checked the case, the Phanteks Eclipse P500A DRGB, and found nothing suspicious. Nothing is touching the mainboard, and no unusual objects are sticking out or being removed. It feels like something is seriously wrong.
You're facing a tricky setup issue. It sounds like your PC boots normally but the monitor doesn't recognize it, even though you hear the start-up sound. The BIOS key doesn't bring up any display either. Switching the HDMI to the motherboard's I/O helped temporarily, allowing some BIOS access. This suggests a possible problem with the monitor's connection or driver setup. Consider checking the cable, power supply, and ensuring the monitor is properly seated. If the issue persists, it might be related to the graphics card or BIOS configuration.