Monitor on Wrong Port (HDMI vs DisplayPort)
What is this error?
Monitor connected via HDMI instead of DisplayPort, limiting refresh rate, color depth, or preventing G-Sync/FreeSync from working properly.
Common causes
- HDMI cable included with monitor used instead of DisplayPort
- GPU HDMI port used because DisplayPort cable was not included
- user unaware that HDMI limits features on their specific monitor
- DisplayPort cable faulty or not fully seated
How to fix it
- Connect monitor using DisplayPort for full refresh rate and adaptive sync support
- use HDMI 2
- 1 only if monitor and GPU both support it
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
If G-Sync or FreeSync is greyed out, or your monitor cannot hit its full refresh rate, check which cable you are using. Many monitors ship with an HDMI cable in the box but their best features require DisplayPort. Here is what to check: look at the back of your monitor and trace the cable to your GPU. If it is HDMI, that may be your problem. For NVIDIA G-Sync Compatible monitors, G-Sync only works over DisplayPort (unless the monitor is HDMI 2.1 and your GPU supports it). For full 1440p@165Hz+, DisplayPort 1.4 is the safe choice. HDMI 2.0 maxes out at 1440p@144Hz and 4K@60Hz. Open NVIDIA Control Panel > Set up G-SYNC. If the option is missing or greyed out, it is likely a port/cable issue. In AMD Software, check Display > AMD FreeSync — same thing. The fix is simple: get a DisplayPort 1.4 cable (they are $10-15) and connect your monitor's DisplayPort input to your GPU's DisplayPort output. After switching, go into Windows Display Settings and reselect your desired refresh rate, as it may reset. Also re-enable G-Sync/FreeSync in your GPU control panel. One tip: DisplayPort cables have a latch mechanism — push the cable in until it clicks. A loose DisplayPort connection causes random blackouts.
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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