MSI Stealth 18 HDMI 2.1 Not Working Windows 11

You connect a 4K 120Hz or 144Hz TV or monitor to the HDMI 2.1 port on your MSI Stealth 18 but Windows 11 only offers 4K 60Hz options in Display settings, or the connected display is not detected at all. The MSI Stealth 18 HDMI 2.1 port is directly connected to the NVIDIA RTX 4080 or 4090 and requires discrete GPU mode to operate at full bandwidth.

This guide covers MSI Center GPU mode switching, NVIDIA driver updates, and display cable requirements to get HDMI 2.1 at full 144Hz from the MSI Stealth 18.

“Connected my 4K 144Hz gaming TV to the Stealth 18 HDMI port and only 60Hz was available. Switched MSI Center to Discrete GPU mode and instantly got 4K 144Hz options.” – Sufian, hardcore gamer from Pahang

Why HDMI 2.1 Bandwidth Is Limited on MSI Stealth 18

The MSI Stealth 18 HDMI 2.1 port is wired directly to the NVIDIA RTX 4080 or 4090 discrete GPU. In Hybrid mode (NVIDIA Optimus), display output is routed through the Intel integrated GPU, which does not support HDMI 2.1 bandwidth. This limits the HDMI output to HDMI 2.0 equivalent – 4K 60Hz maximum. Switching to Discrete GPU only mode bypasses the integrated GPU and unlocks full HDMI 2.1 bandwidth.

• MSI Center in Optimus/Hybrid mode routes HDMI through Intel iGPU limiting to HDMI 2.0 speeds
• HDMI cable is HDMI 2.0 – does not support 48 Gbps bandwidth needed for 4K 144Hz
• NVIDIA driver version below 531.41 lacks full HDMI 2.1 support
• Display not set to HDMI 2.1 mode in TV settings (requires enabling Game Mode or HDMI 2.1 input on TV)

Fix 1 – Switch to Discrete GPU Mode in MSI Center

Open MSI Center, go to General Settings – User Scenario (or Find GPU Mode in the interface), and change from Optimus to Discrete GPU (dGPU). A system restart is required. After restart, plug in the HDMI 2.1 cable and go to Windows Settings – System – Display – Advanced display to verify the monitor is showing at the correct refresh rate. Full HDMI 2.1 bandwidth at 4K 144Hz requires Discrete GPU mode.

Fix 2 – Update NVIDIA Driver

Download NVIDIA driver 531.41 or later from nvidia.com/drivers or MSI Support for the Stealth 18. Install with Clean installation option. Earlier drivers lack DSC (Display Stream Compression) support required for 4K 144Hz via HDMI 2.1 on RTX 40 series mobile GPUs.

Display Settings Refresh Rate Check

After switching to dGPU mode and updating drivers, right-click the desktop and select Display settings. Click Advanced display and verify the HDMI-connected monitor appears. Set the refresh rate to 120 or 144Hz in the Choose a refresh rate dropdown. If only 60Hz appears, check the HDMI cable rating and TV input settings.

Fix 3 – Use a Certified HDMI 2.1 Cable

HDMI 2.1 at 4K 144Hz requires a certified HDMI 2.1 cable supporting 48 Gbps bandwidth. Most standard HDMI cables (even newer ones) are only rated for HDMI 2.0 at 18 Gbps, which limits to 4K 60Hz. Purchase an HDMI cable explicitly labeled HDMI 2.1 48Gbps. Cable length matters – keep it under 2 meters for reliable 4K 144Hz at 48 Gbps.

Fix 4 – Enable HDMI 2.1 on the TV Input

Many TVs require manually enabling HDMI 2.1 or Enhanced Signal on each input port. On Sony TVs, go to Settings – External inputs – HDMI signal format and set the input to Enhanced format. On LG TVs, enable HDMI Deep Colour. On Samsung TVs, enable Input Signal Plus for the HDMI input. Without this, the TV signals HDMI 2.0 capability and Windows limits refresh rate accordingly.

Frequently Asked Questions

Why is HDMI 2.1 not working on MSI Stealth 18?

The laptop is in Optimus/Hybrid mode routing HDMI through Intel iGPU limited to HDMI 2.0 bandwidth. Switch MSI Center to Discrete GPU mode for full HDMI 2.1 support.

How do I enable HDMI 2.1 on MSI Stealth 18?

Open MSI Center, change GPU mode to Discrete GPU (dGPU), restart, and update NVIDIA driver to 531.41 or later. Also use a certified HDMI 2.1 48Gbps cable.

Does MSI Stealth 18 support 4K 120Hz via HDMI 2.1?

Yes – up to 4K 144Hz with Discrete GPU mode, NVIDIA driver 531.41+, a certified HDMI 2.1 cable, and a TV with HDMI 2.1 input enabled.

What NVIDIA driver version is needed for HDMI 2.1 on MSI Stealth 18?

Version 531.41 or later for full HDMI 2.1 DSC support on RTX 40 series laptop GPUs. Available from NVIDIA.com or MSI Support.

Conclusion

HDMI 2.1 not working on MSI Stealth 18 in Windows 11 requires switching MSI Center to Discrete GPU mode, updating NVIDIA driver to 531.41+, using a certified HDMI 2.1 48Gbps cable, and enabling HDMI 2.1 format on the TV input. All four steps together are needed for reliable 4K 144Hz via HDMI 2.1 on the Stealth 18.