What is DISPLAYPORT-NO-SYNC?
This medium-severity issue affects the graphics card (GPU). Monitor connected via DisplayPort randomly flickers, dims, or loses sync. It's also often linked to poor quality or too long DP cable (>1.8m without active converter). The steps below are ordered to resolve this efficiently.
Common Causes
- Poor quality or too long DP cable (>1.8m without active converter)
- Monitor frequency set above cable limit (DP 1.2 vs DP 1.4)
- DisplayPort 1.4 disabled in GPU BIOS
Step-by-Step Fix Guide
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1
Replace the cable with a certified DP cable
We'd suggest Replace the cable with a certified DP cable first — it's the fix most often responsible for solving DISPLAYPORT-NO-SYNC outright.
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2
Lower the refresh rate in Display Manager
A second occurrence often means a less common gpu instability cause is at play, which later steps address.
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3
Turn off G-Sync/FreeSync as a test
"Turn off G-Sync/FreeSync as a test" covers a less common but documented cause of DISPLAYPORT-NO-SYNC.
Commands & Diagnostics
dxdiag
Frequently Asked Questions
DISPLAYPORT-NO-SYNC is most often triggered by poor quality or too long DP cable (>1.8m without active converter). Other reports point to monitor frequency set above cable limit (DP 1.2 vs DP 1.4) and displayPort 1.4 disabled in GPU BIOS as contributing factors.
Try "Replace the cable with a certified DP cable" first — it resolves most DISPLAYPORT-NO-SYNC cases on its own. Only work through the rest of the guide above if it comes back.
As a medium-severity issue, DISPLAYPORT-NO-SYNC is more of a stability annoyance than a hardware risk — the steps above should clear it up.
In most cases, yes — the guide above resolves DISPLAYPORT-NO-SYNC without a clean install. Treat a reinstall as the last resort, not the first move.
Yes — GPU or memory overclocking is one of the most frequent triggers for DISPLAYPORT-NO-SYNC. Try resetting your GPU to stock clocks using MSI Afterburner or your OC software, then test for stability before investigating other causes.
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