NVIDIA G-Sync Not Working or Flickering
What is this error?
G-Sync or G-Sync Compatible mode not activating, flickering, or causing black screens with compatible monitors.
Common causes
- G-Sync not enabled in NVIDIA Control Panel
- incorrect cable (must use DisplayPort for native G-Sync)
- game running outside G-Sync range
- V-Sync settings conflict
- monitor firmware needs update
How to fix it
- Enable G-Sync in NVIDIA Control Panel
- use DisplayPort cable
- cap framerate below monitor max
- enable V-Sync in NVCP
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
G-Sync issues — flickering, not activating, black screens — are extremely common and usually a settings issue, not hardware failure.
How to fix G-Sync:
- Enable G-Sync: NVIDIA Control Panel > Display > Set Up G-Sync > check 'Enable G-Sync, G-Sync Compatible' and select 'Enable for full screen and windowed mode'
- Use DisplayPort, not HDMI — native G-Sync requires DisplayPort. G-Sync Compatible over HDMI only works on some newer monitors/GPUs
- Cap your framerate 3fps below your monitor's max refresh rate (e.g., 141fps for a 144Hz monitor) using NVIDIA Control Panel's frame limiter or RTSS
- Enable V-Sync in NVIDIA Control Panel (not in-game) — this prevents tearing when FPS exceeds the G-Sync range
- For flickering: check if your monitor firmware needs updating (check manufacturer's website)
- In NVIDIA Control Panel > Display > Change Resolution, make sure your monitor is set to its highest refresh rate
- Set the monitor to its native G-Sync mode in the monitor's OSD menu
- If G-Sync Compatible shows as 'Pending', click 'Enable' — some monitors need manual approval
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
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