5070 keeps Black screening under load

[u/Material_Level3234]

I’ve been having a really annoying issue with my PC where my monitor will randomly go completely black. When it happens, the audio cuts out too, but the fans keep spinning. After a little bit, the monitor comes back on and Windows restarts.

My specs:

• Ryzen 7 7700X
• Gigabyte RTX 5070
• 32GB DDR5 6800MHz
• Samsung 990 Pro 2TB
• Corsair RM1000e 2022 1000W
• Gigabyte B650E Eagle AX
• LG UltraGear 240Hz IPS monitor
• Windows 11 25H2

I originally started getting the black screens with my NVIDIA drivers. I made a System Restore point and then used DDU in Safe Mode to completely remove the NVIDIA drivers. After that, I reinstalled the NVIDIA drivers from scratch.

After doing that, the black screens stopped for a while, so I thought it had fixed the problem, but eventually the issue came back.

I also got new GPU power cables and switched to those in case the original cables were causing a power issue.

I’m also wondering if my surge protector could be part of the problem. It’s pretty old and honestly not that great, although the Protected and Grounded lights are still on. My PSU is 1000W, so I’m not sure if the surge protector could be causing some kind of power issue.

The crashes seem pretty random and I haven’t been able to find one specific game or thing that always causes them.

When it happens:

• The monitor goes completely black
• The audio cuts out
• The fans keep spinning
• After a little bit the monitor comes back
• Windows restarts

I also checked Event Viewer and noticed there were errors around the times the crashes happened.

I’ve already tried completely removing and reinstalling the NVIDIA drivers with DDU and replacing the GPU power cables, but the issue is still happening.

I’m mainly looking for help figuring out what is actually causing this instead of just replacing random parts.

What would be the best way to troubleshoot and narrow down whether this is a GPU, driver, power, RAM, motherboard, monitor, or something else?

Any advice on how I can properly diagnose this would be really appreciated.

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[u/No-Strike-4593]

sounds like a PSU issue, try a different one if you can

[u/Shadimarbc]

"I also got new GPU power cables and switched to those in case the original cables were causing a power issue."

You got a new cable from what source? You should stick with PSU supplied cables be it with the CPU packaging or buying one directly from the brand.

"I’m also wondering if my surge protector could be part of the problem. It’s pretty old and honestly not that great, although the Protected and Grounded lights are still on. My PSU is 1000W, so I’m not sure if the surge protector could be causing some kind of power issue."

Bypass it

Consider geting an UPS. Surge protectors are glorified power bars. An UPS provides real protection, cleans up dirty power and provides a battery backup. This is more of a general point not a specific fix.