Display shuts off briefly and restarts.
Display shuts off briefly and restarts.
The problem affected both systems. I rely on a UPS but the PC and monitor stayed connected to the wall. It seems like I've already addressed previous questions in the original post. I've documented several solutions I've attempted. I'll share it again. - All components have been replaced. The GPU has gone through three RMA processes. - Windows 11 was reinstalled multiple times. - Graphics drivers were reset many times. - I kept the drivers updated. - Display cables were swapped four times, each time using a fresh cable. VESA certified displayport 1.4 cables were tried once, and a displayport 2.0 cable was also tested. - I've used three different monitors. - I changed GPU display ports several times. - Gsync was disabled. - Occurs with HDR enabled or disabled. - It happened whether the monitor was plugged in or not. - Connected to a standard 1000W power supply.
You've already checked for hardware and power problems, tested various setups, and even used a UPS. A persistent issue is unlikely due to hardware faults unless all systems use the same GPU model—a design flaw. It’s probably a software issue, possibly with your drivers or Windows. Trying Safe Mode (running only default drivers) helps confirm if the problem remains. Check Event Viewer for any related entries.
I'm not sure that's the case. As I've mentioned, I've reinstalled windows 11 numerous times. I've also reinstalled, and updated my GPU drivers. I've used software to completely remove them to then install them again. I honestly doubt that a years worth of Nvidia GPU driver updates would show the same issue consistently. I could definitely still try but I'd have to be glued onto my screen for days. The issue appears completely at random, and so it could be a matter of days before I see it pop up again. When it's happened, I've looked into event viewer but it's often swamped with information I have a difficult time interpreting. I've been using the 10GB model RTX 3080 founders edition across systems.
It seems the problem likely stems from software rather than hardware, given your thorough troubleshooting. I checked the graphics drivers first—they appear to be the probable cause. Since this occurs intermittently, staying in Safe Mode isn't necessary. Before the next occurrence, look into Event Viewer for any related entries.
OP, there are several simple errors people often make. Many overlook details others take for granted. Don’t assume I’m thinking of you as foolish if you’re aware of these points. Some individuals are surprised by what they don’t know. You might want to verify the display settings—HDMI 1.4, 2.0 or 2.1—and ensure the refresh rate matches. In low light here, consider if the UPS battery is weak or degraded due to age. Have you run a battery test recently? If the system forces a self-test or line conditioning protection switches it to backup mode when the battery can’t handle the load, that could be the cause. A faulty load transfer switch in the unit might also play a role. Assuming nothing else, double-check if all setup instructions were followed. New units usually come with battery terminals disconnected and plastic sheeting over the contacts to avoid oxidation or short circuits during storage. The battery can’t charge or function properly until these issues are resolved. I’m not making assumptions, but it’s common for people to skip the manual and just plug in. Another chance is that line faults trigger backup mode, while the monitor is connected to a power source not linked to the battery.