Issue with PC display or graphics: problems with display port signal loss and refresh rate.
Issue with PC display or graphics: problems with display port signal loss and refresh rate.
Hello everyone,
I’m facing an issue with my PC and was hoping for some assistance. My system has these details:
Motherboard: Asus ROG Crosshair VIII Dark Hero
CPU: AMD Ryzen 9 5900X with 12 cores
RAM: Corsair Vengeance RGB Pro SL 32GB (2x16GB) DDR4 3200MHz C16
Graphics card: MSI RTX 3080 Ti Suprim X
Power supply: Corsair RMx Seriex RM 1000x
Display: Asus ROG Swift PG279QM
Everything was functioning properly until recently. Two days ago, the screen refresh rate changed to 60Hz after a Windows start-up. When I attempted to bring it back to 240Hz, the monitor shut down and displayed "no Displayport signal." After several tests, the only stable settings I’ve managed are:
120Hz with HDR enabled, 8-bit color depth
144Hz with HDR disabled, 8-bit color depth
Any other settings above these cause the monitor to turn off and show a "no Displayport signal" message. Even when switching from 120Hz to 144Hz with HDR on, the same issue persists.
Additional notes:
- When powering on the PC, the monitor only lights up during the Windows login screen. No standard load screens or BIOS/UEFI prompts appear.
- Previously, I experienced similar problems before Windows login; installing an "Display ID Firmware" from nVidia resolved it. However, my monitor still ran at 240Hz without issues on Windows and games.
- With monitors connected via DisplayPort (and HDMI), I can see the load screens before Windows starts.
- I’ve searched online and in Tom’s Hardware, updated drivers to the latest version, performed a clean install, and tested with BIOS updates, Fast boot enabled/disabled, and CMS settings.
- Before this, I connected my keyboard and mouse to the monitor’s USB ports, unplugged them, and then connected them directly to the CPU case. I restored the graphics card and monitor to factory defaults.
- I tried connecting the monitor to a laptop via HDMI instead of DisplayPort, but the laptop didn’t recognize it or display anything. Connecting another monitor and a TV worked, showing images at 120Hz and 100Hz. This suggests my graphics card might not support higher refresh rates.
Could you help identify what’s going wrong? How can I get things back to normal?
Thank you in advance!
Welcome to the forums, newcomer! The BIOS of the motherboard has been updated to the newest version. Have you cleared the CMOS after confirming the BIOS flash was done with the latest release? I recommend using DDU to remove all GPU drivers from your system. Then manually reinstall the most recent driver available from Nvidia's support site, running it in administrator mode via the installer.