AMD FreeSync Flickering / Brightness Pulsing
What is this error?
Screen flickering, brightness pulsing, or gamma shifts when FreeSync is active. The monitor brightness visibly fluctuates during gaming.
Common causes
- frame rate dropping below FreeSync range
- monitor firmware bug with FreeSync
- FreeSync Premium vs FreeSync Basic limitations
- LFC (Low Framerate Compensation) triggering erratically
- HDMI vs DisplayPort FreeSync differences
- HDR combined with FreeSync
How to fix it
- Cap frame rate above FreeSync minimum range
- update monitor firmware
- use DisplayPort instead of HDMI
- disable HDR
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
FreeSync flickering shows up as the screen brightness pulsing or flashing during gaming. It is most noticeable in games with variable frame rates — RPGs like Cyberpunk 2077 or Starfield where FPS swings between 40-80.
How to fix it:
- Cap your frame rate above your monitor's FreeSync minimum range. If your monitor has a 48-144Hz FreeSync range, cap at 50+ FPS using RTSS or the in-game limiter. Dropping below the range triggers flicker
- Use DisplayPort instead of HDMI — HDMI FreeSync (called AMD FreeSync over HDMI) has more flickering issues than DisplayPort Adaptive-Sync
- Check for a monitor firmware update on the manufacturer's website. Many FreeSync flicker issues are monitor-side bugs that get patched
- In AMD Software > Gaming > Display, try toggling FreeSync off and back on
- If using HDR, disable it temporarily. FreeSync + HDR is a known problem combination that causes brightness pulsing on many monitors
- In your monitor's OSD settings, check if there is a 'FreeSync Premium' or 'Adaptive Sync' toggle — some monitors work better with specific settings
- As a last resort, set FreeSync range manually using CRU (Custom Resolution Utility) to narrow the range and avoid the problematic low end
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
Or let Crashless do the deep analysis for you -- our AI checks drivers, temps, event logs, and 400+ known patterns automatically.
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