To set a monitor to 240Hz, confirm DisplayPort 1.2+ or HDMI 2.0+ and GPU support, then select 240Hz in Windows Display Settings or GPU control panel.
A 240Hz monitor can sit at 60Hz for months if it’s plugged in with the wrong cable. The HDMI 1.4 lead that ships in the box won’t carry a 240Hz signal — the fix is swapping to a DisplayPort 1.4 cable, then telling Windows to use the higher refresh rate. This guide walks through every step: the cable you need, the settings to change in Windows and your GPU control panel, and what to check when the 240Hz option simply won’t appear.
What Hardware Do You Need for 240Hz?
240Hz requires three pieces of hardware working together: a monitor that supports it at your chosen resolution, a cable rated for that bandwidth, and a graphics card powerful enough to drive it.
Most 240Hz monitors offer the refresh rate at 1080p or 1440p. 4K at 240Hz exists but demands HDMI 2.1 or DisplayPort 1.4 — neither of which is standard on budget cards or older laptops. The cable matters as much as the monitor does. DisplayPort 1.2a is the minimum for 1080p and 1440p at 240Hz; DisplayPort 1.4 is recommended for headroom. HDMI 2.0 works for 1080p and 1440p at 240Hz, but only HDMI 2.1 can push 4K at 240Hz. Dual-Link DVI and plain HDMI 1.4 are incompatible and will cap you at 60Hz or 120Hz at best.
On the PC side, the cable must connect to the graphics card’s output ports (the lower, horizontal ports on the rear of the case), not the motherboard’s video ports near the USB and audio jacks. A laptop needs a port with DisplayPort 1.4 alt mode over USB-C, or a full-size HDMI 2.1 or mini-DisplayPort.
Windows 10 and 11 Steps for 240Hz
Once the hardware is connected correctly, the refresh rate setting lives in Windows Display Settings. The exact menu label differs slightly between versions, but both follow the same path.
Windows 11: Right-click the desktop and select Display settings. Scroll down to Advanced Display. Under Display information, click Choose a refresh rate and select 240Hz. The screen will go black for a moment — if it doesn’t return to normal within 15 seconds, the change reverts automatically.
Windows 10: Right-click the desktop and select Display settings. Scroll to Advanced Display Settings. Click Display Adapter Properties for the monitor you’re configuring. Open the Monitor tab, find the Screen refresh rate dropdown, select 240Hz, then click Apply and OK.
Once the setting sticks, the success cue is a smooth cursor movement — drag a window rapidly and it should leave no ghost trail behind.
240Hz Cable Standards at a Glance
| Cable Type | Max 240Hz Resolution Supported | Notes |
|---|---|---|
| DisplayPort 1.2a | 1080p / 1440p at 240Hz | Minimum for 240Hz; no 4K support |
| DisplayPort 1.4 | 1080p / 1440p / 4K at 240Hz | Recommended for full bandwidth and future-proofing |
| HDMI 2.0 | 1080p / 1440p at 240Hz | Works for most 240Hz monitors below 4K |
| HDMI 2.1 | 4K at 240Hz / 1440p at 240Hz | Required for 4K 240Hz; backward compatible |
| HDMI 1.4 | 1080p at 60Hz (no 240Hz) | Incompatible with 240Hz at any resolution |
| Dual-Link DVI | Not supported | Physically incompatible; use DP or HDMI |
| USB-C with DP Alt Mode | Depends on host GPU | Works on laptops if the port supports DP 1.4 |
NVIDIA and AMD Control Panel Setup
Windows shows the refresh rates your monitor reports as compatible, but some GPUs hide 240Hz until you set it through the manufacturer’s control panel. The process is different for NVIDIA and AMD cards.
NVIDIA: Open NVIDIA Control Panel (right-click the desktop). Under Display, select Change Resolution. Pick your target resolution — such as 1920×1080 — then choose 240Hz from the Refresh rate dropdown. If 240Hz is missing, go to 3D Settings > Configure Surround, PhysX and check that the monitor is connected to Port 1 on the GPU rather than Port 2 or 3. Some cards only expose full bandwidth on the first port.
AMD: Open AMD Radeon Software (right-click the desktop). Go to the Display tab, select your monitor, then set Refresh Rate to 240Hz. If the option is grayed out, verify the cable type in the same screen — Radeon Software shows the active link speed, which helps confirm whether the cable is the bottleneck.
For anyone still shopping for a monitor that can actually run these settings, our tested roundup of budget 240Hz monitors worth buying breaks down the models that deliver real 240Hz without the premium price tag.
Why Is 240Hz Not Showing Up?
When the 240Hz option is missing, the cause is almost always the cable or the port it’s plugged into. The most common fix is swapping to a DisplayPort 1.4 cable and confirming it’s connected to the graphics card, not the motherboard.
If the cable and port are correct, check whether the monitor itself has a refresh rate toggle in its on-screen display (OSD) menu. Some 240Hz monitors ship in a 120Hz mode by default and need to be switched — look for a Response Time or Refresh Rate setting in the OSD and set it to the maximum. For NVIDIA users, 240Hz can also disappear when G-Sync is enabled over HDMI, which doesn’t support the combination. Switch to DisplayPort and enable G-Sync there instead.
On older GPUs or unusual monitor combinations, a custom resolution may be necessary. Custom Resolution Utility (CRU) lets you force a 240Hz profile with CVT reduced blank timing — but this should be a last resort after ruling out cable, port, and driver issues. Update GPU drivers first (NVIDIA, AMD, or Intel Arc) because outdated drivers can suppress higher refresh rates entirely.
Common 240Hz Problems and Fixes
| Problem | Likely Cause | Fix |
|---|---|---|
| 240Hz not listed in Windows | HDMI 1.4 or DVI cable | Replace with DisplayPort 1.4 or HDMI 2.0+ |
| Stuck at 120Hz | Windows scaling or G-Sync conflict | Set refresh rate in Display Settings; enable G-Sync via DisplayPort |
| Option grayed out in GPU panel | Connected to motherboard port | Move cable to graphics card’s output ports |
| G-Sync not working at 240Hz | G-Sync over HDMI (unsupported) | Use DisplayPort for G-Sync; disable sync for raw 240Hz |
| Screen flickers after setting 240Hz | Insufficient cable bandwidth | Upgrade to DisplayPort 1.4 certified cable |
| 240Hz works but games feel stuttery | GPU can’t sustain 240 FPS | Lower in-game graphics settings; disable V-Sync |
In-Game Settings for 240Hz
Setting Windows and the GPU to 240Hz is half the job. Each game also needs its own refresh rate configured, and some will cap the frame rate below 240 FPS by default.
Open the game’s video or display settings menu and set Refresh Rate to 240Hz. Then disable any FPS cap or frame rate limiter that’s set below 240. Turn off V-Sync unless you’re experiencing screen tearing — V-Sync can clamp the frame rate to your monitor’s maximum, which is fine at 240Hz, but adds input lag. G-Sync or FreeSync should be enabled through the GPU control panel, not the game, and only when using a DisplayPort connection.
If your GPU can’t hold 240 FPS in a demanding title, drop settings like shadows, reflections, and ambient occlusion to medium or low. An inconsistent frame rate that bounces between 150 and 240 feels worse than a locked 144 FPS on a 144Hz monitor, so be honest about what your hardware can sustain.
Final 240Hz Setup Checklist
Run through this list to confirm every link in the chain is working. A missing check is almost always the reason 240Hz isn’t showing.
- Cable: DisplayPort 1.4 or HDMI 2.0+ connected to GPU output ports (not motherboard)
- Monitor OSD: Refresh rate or response time set to maximum (often labeled 240Hz or “Extreme”)
- Windows: Advanced Display > Choose a refresh rate > 240Hz selected
- GPU control panel: Refresh rate set to 240Hz under Change Resolution (NVIDIA) or Display (AMD)
- Drivers: Latest GPU driver installed from NVIDIA, AMD, or Intel
- Games: In-game refresh rate set to 240Hz, FPS cap disabled, V-Sync off
- Cursor motion is smooth with no ghosting; the monitor’s OSD confirms 240Hz input
FAQs
Can I use an HDMI cable for 240Hz?
Yes, but only HDMI 2.0 or higher. HDMI 2.0 supports 240Hz at 1080p and 1440p; HDMI 2.1 is required for 4K at 240Hz. Standard HDMI 1.4 cables that often ship with monitors will not carry a 240Hz signal and will cap the refresh rate at 60Hz.
Does setting 240Hz damage the monitor?
No. Running a 240Hz monitor at its rated refresh rate is within its designed operating range and will not cause damage. Overclocking a monitor beyond its rated refresh rate — such as pushing a 240Hz panel to 270Hz — may generate extra heat and should be done with adequate cooling and a high-bandwidth cable.
Why does my monitor show 240Hz but games feel laggy?
A monitor set to 240Hz will still feel stuttery if the GPU cannot maintain 240 FPS in that game. Inconsistent frame rates cause visible micro-stutters. Lower in-game graphics settings or consider a GPU upgrade to match the monitor’s refresh rate.
Do I need a special DisplayPort cable for 240Hz?
Any certified DisplayPort 1.4 cable will work. Avoid very long cables (over 10 feet) or uncertified “budget” cables that may not hold the full bandwidth. Look for VESA-certified DisplayPort cables for reliable 240Hz at 1440p.
Will 240Hz work over USB-C on a laptop?
It depends on the laptop’s USB-C port. The port must support DisplayPort 1.4 alt mode, and the laptop’s GPU must be powerful enough to drive 240Hz output. Check your laptop’s specifications for DP alt mode support and use a USB-C to DisplayPort cable rather than a USB-C to HDMI adapter.
References & Sources
- ASUS ROG. “Settings Guide: How to Set Up Your Gaming Monitor” Official manufacturer guide for refresh rate configuration.
- BenQ. “Is 240Hz Monitor Good for Gaming and Worth the Upgrade?” Explains cable requirements and eye comfort at high refresh rates.
- RTINGS. “The 6 Best 240Hz Monitors of 2026” Independent testing data for 240Hz monitor performance.
- NVIDIA. “How to Enable 240 Hz on Monitor using Windows 10 or 11” Video walkthrough covering Windows and NVIDIA Control Panel steps.