Stuck at 60Hz on a New 240Hz Monitor? DisplayPort 2.1 and the Cable Trap
Quick answer: If a high-refresh monitor is stuck at 60Hz, the higher rate is almost always blocked by the cable, a setting, or the driver — not a fault. With today's 240Hz-plus and 4K panels, cable bandwidth matters more than ever. Confirm what you are actually getting with the refresh rate test, then work the fixes.
Select the rate first
Often the higher rate is available and was simply never chosen. Go to Settings, System, Display, Advanced display, and pick the highest rate under "choose a refresh rate." On some setups you also have to enable it in the NVIDIA or AMD control panel.
The cable and bandwidth trap
Refresh rate, resolution and cable bandwidth are linked. A cable that runs 1080p at 144Hz may only manage 60Hz at 4K because higher resolutions eat bandwidth. For today's fast panels you generally want DisplayPort 2.1 or HDMI 2.1 — older HDMI 1.4 caps you at 60Hz at 1080p, and even some in-box cables underperform. Many 2026 OLED monitors specifically rely on DisplayPort 2.1 to hit their top modes, so a cable that isn't rated for that bandwidth quietly limits you.
Docks, adapters and drivers
Running through a docking station or an adapter frequently caps the rate — connect the monitor directly to the GPU to test. Update your graphics driver too, since an outdated one can hide the higher rates. And check the monitor's on-screen menu for an overclock or "OC" toggle that some panels require to unlock their full refresh.
Verify the fix
After each change, re-run the refresh rate test to confirm the display is genuinely running faster, not just claiming to. Our full guide on a monitor stuck at 60Hz covers the cable standards and bandwidth math in detail.
Sources: VESA — DisplayPort · HDMI Forum
Frequently asked questions
Why is my new monitor stuck at 60Hz?
Often the higher rate is available and was simply never chosen. Check Settings, System, Display, Advanced display and pick the highest rate offered — on some setups you also have to enable it in the NVIDIA or AMD control panel.
Can the cable cap my refresh rate?
Yes, and silently. Refresh rate, resolution and cable bandwidth are linked, so a cable that runs 1080p at 144Hz may only manage 60Hz at 4K. A cable that physically fits and carries a picture can still be negotiating a lower link rate.
Which cable specification should I look for?
On DisplayPort it is DP80 or DP80LL; on HDMI it is Ultra96. Neither is implied by the connector shape.
Could a dock or adapter be the cause?
Frequently. Running through a docking station or adapter often caps the rate, so connecting the monitor directly to the GPU is the quickest way to rule it out.
The 2026 cable and bandwidth picture
DisplayPort 2.1b carries UHBR20, which is 20Gbps per lane across four lanes for 80Gbps total, and adds the DP80LL low-loss cable specification so that full rate survives longer cable runs. HDMI 2.2 raises its ceiling to 96Gbps and requires the new Ultra96 cable to reach it, supporting 4K at up to 480Hz, 8K at up to 240Hz and 10K at 120Hz.
The trap this article describes has not gone away — it has moved up a tier. A cable that physically fits and carries a picture may still be negotiating a lower link rate than your monitor supports, and the symptom is exactly the same: a refresh rate ceiling you cannot explain. On DisplayPort the specification to look for is DP80 or DP80LL; on HDMI it is Ultra96. Neither is implied by the connector shape.
The diagnostic order is unchanged and still the fastest route: confirm the rate your display is actually running at first, then change one variable at a time — cable, then port, then the display setting. Measuring before you buy a replacement cable saves most people the purchase entirely.