My PC randomly loses video output after anywhere from 20 minutes to an hour, whether I'm gaming or just watching YouTube. The monitors go black, but I can still hear the audio from whatever was running. At the same time, the fans suddenly ramp up to 100%, and the keyboard and mouse stop responding, so I have to shut the computer down manually.
I've already sent the graphics card back to the manufacturer for testing, and they reported no problems. I've also updated the drivers, performed a clean driver removal and reinstall, installed a new CPU cooler, replaced the RAM, and tried using only one monitor at a time. Repair shops have stress-tested the system for hours without reproducing the problem.
The main components are a Corsair RM850x power supply, an NVIDIA GeForce RTX 4070 Ti, and an AMD Ryzen 9 7900X. I'm planning to check Event Viewer, but does anyone have ideas about what could cause this kind of crash?
3 Answers
Since the issue doesn’t happen at the repair shop, I’d consider the power being supplied at home. Try a good-quality surge protector or, ideally, a UPS with voltage regulation. A faulty outlet, circuit, or power strip can sometimes cause sudden crashes that look like a graphics card failure.
Check whether Gigabyte Control Center or another motherboard utility is installed. Hardware-control software can sometimes conflict with graphics drivers, fan control, or power management. I’d remove unnecessary monitoring and RGB utilities, then test with a clean driver installation and default BIOS settings.
The symptoms could point to the power supply, a graphics card power connection, or the card briefly losing stable contact. Check that every power cable is fully seated, especially the RTX 4070 Ti’s adapter, and make sure it isn’t sharply bent near the connector. If possible, testing with another known-good PSU would help narrow it down.
I’ve tried plugging the PC directly into the wall and it still happened. By dirty power, do you mean an issue with the outlet or the circuit itself?