Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX HDMI 2.1 Not Working Fix Windows 11

The HDMI 2.1 port on your Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX is not outputting the expected high refresh rate to a 4K 120Hz monitor – the monitor shows only 4K@60Hz or lower despite HDMI 2.1 capability, or the HDMI connection does not work at all. AMD Radeon driver updates and HDMI 2.1 cable verification restore full HDMI 2.1 4K 120Hz output on the Lenovo IdeaPad Pro 5 Gen 8 AMD.

This guide covers HDMI 2.1 cable requirements, AMD Radeon driver updates, and monitor refresh rate configuration for the Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX in Windows 11.

“IdeaPad Pro 5 Gen 8 AMD only showed 60Hz on 4K 120Hz gaming monitor. Thought HDMI 2.1 port was broken. Changed HDMI cable to a 48Gbps rated Ultra High Speed cable – immediately showed 4K 120Hz option in display settings. The cable was the only issue.” – Haikal, gaming content creator from Kepong

Why HDMI 2.1 Does Not Output 4K 120Hz on IdeaPad Pro 5 Gen 8 AMD

HDMI 2.1 bandwidth (48Gbps) is required for 4K@120Hz output, while the more common HDMI 2.0 standard supports only 18Gbps (maximum 4K@60Hz). Most HDMI cables in use today are HDMI 2.0 or earlier – they physically connect to HDMI 2.1 ports but limit the data bandwidth to 18Gbps, capping 4K resolution at 60Hz maximum. The Lenovo IdeaPad Pro 5 Gen 8 AMD HDMI 2.1 port can only achieve 4K@120Hz when the cable connecting it to the monitor is rated as Ultra High Speed HDMI (HDMI 2.1, 48Gbps). An AMD Radeon driver not set to maximum refresh rate is a secondary cause that keeps the display at 60Hz even with a correct cable.

• HDMI 2.0 cable (18Gbps) connected instead of HDMI 2.1 (48Gbps) – limits 4K to 60Hz
• Windows Display settings showing 60Hz as selected refresh rate despite 120Hz capability
• Monitor HDMI input not set to HDMI 2.1 mode in monitor OSD settings
• AMD Radeon driver outdated – HDMI 2.1 DSC (Display Stream Compression) not fully supported

Fix 1 – Verify HDMI 2.1 Cable (48Gbps Rated)

Check the HDMI cable currently in use. HDMI 2.1 cables (Ultra High Speed HDMI) are labeled with the HDMI 2.1 specification or 48Gbps on the packaging or cable connector. Standard HDMI cables (HDMI 2.0, High Speed HDMI, Premium High Speed HDMI) support only 18Gbps and cannot carry 4K@120Hz signal. Replace the current cable with an HDMI 2.1 certified cable from a reputable manufacturer (Club3D, Lindy, AudioQuest HDMI 2.1). After replacing the cable, go to Settings – System – Display – Advanced display and check the available refresh rates. 4K@120Hz should now appear in the dropdown if the cable is correct and the monitor supports HDMI 2.1 4K@120Hz input.

Fix 2 – Set Refresh Rate in Windows Display Settings

Go to Settings – System – Display – Advanced display. Under Refresh rate, click the dropdown and select the highest available rate (120Hz or 144Hz for supported monitors). Windows may default to 60Hz even when the hardware supports higher rates, especially after a new driver installation or monitor connection. After changing the refresh rate to 120Hz, the display should switch within 5 seconds. If no 120Hz option appears despite having an HDMI 2.1 cable and HDMI 2.1 monitor, check the monitor OSD (On-Screen Display) – navigate to HDMI settings in the monitor menu and ensure the HDMI input mode is set to HDMI 2.1 or UHD 4K 120Hz mode rather than the default HDMI 1.4/2.0 compatibility mode that many monitors ship in.

Update AMD Radeon Driver via Lenovo Vantage

Open Lenovo Vantage and check System Update for AMD Radeon driver updates. Install and restart. Updated AMD Radeon drivers for the Ryzen 7 7745HX with RDNA 3 integrated graphics and NVIDIA dedicated GPU include improved HDMI 2.1 signaling and DSC (Display Stream Compression) support. DSC allows 4K@120Hz 10-bit HDR signals to be transmitted within the 48Gbps HDMI 2.1 bandwidth – without the current AMD or NVIDIA driver supporting DSC correctly, some HDMI 2.1 high-bandwidth modes may not negotiate successfully even with the correct cable on the IdeaPad Pro 5 Gen 8 AMD platform. After driver update, the AMD control panel shows the full HDMI 2.1 resolution and refresh rate options available for the connected monitor.

Fix 3 – Enable HDMI 2.1 Mode in Monitor OSD

Many HDMI 2.1 monitors ship in backward-compatible HDMI 2.0 mode on all HDMI inputs by default to improve device compatibility. Access the monitor’s On-Screen Display (OSD) menu using the monitor buttons or joystick. Navigate to Input settings or HDMI settings for the connected HDMI port. Find an option labeled HDMI 2.1, UHD Deep Colour, Enhanced HDMI, HDMI Compatibility Mode Off, or similar (exact naming varies by monitor brand). Enable HDMI 2.1 mode for the connected input. After enabling, the monitor renegotiates the HDMI connection with the IdeaPad Pro 5 Gen 8 AMD and the full HDMI 2.1 refresh rate options become available in Windows Display Settings for 4K@120Hz gaming and content playback.

Fix 4 – Check Which GPU Controls HDMI Port

On the Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX with discrete GPU (if present), the HDMI port may connect to either the AMD Ryzen integrated graphics or the NVIDIA/AMD discrete GPU depending on the IdeaPad Pro 5 configuration. In Hybrid GPU mode, the HDMI port route varies – check Lenovo Vantage for GPU mode settings. In Discrete GPU mode, HDMI connects to the discrete GPU for maximum bandwidth. If the HDMI port connects through the AMD Ryzen 7 7745HX integrated graphics in the current GPU mode, AMD Radeon integrated driver update from Lenovo Vantage is required. If connecting through discrete GPU in Discrete mode, the discrete GPU driver from Lenovo Vantage handles HDMI 2.1 output.

Frequently Asked Questions

How do I fix HDMI 2.1 not working on Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX?

Replace HDMI cable with 48Gbps rated HDMI 2.1 (Ultra High Speed). Enable HDMI 2.1 mode in monitor OSD. Set 120Hz in Windows Advanced display. AMD Radeon driver update via Lenovo Vantage.

Why does Lenovo IdeaPad Pro 5 Gen 8 AMD not output 4K 120Hz via HDMI?

HDMI 2.0 cable limiting to 60Hz (most common). Monitor OSD in HDMI 2.0 compatibility mode. Windows refresh rate not set to 120Hz in display settings. All three must be correct for 4K@120Hz.

Does Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX support HDMI 2.1?

Yes – HDMI 2.1 port (48Gbps) supporting 4K@120Hz, 8K@30Hz, and VRR for gaming with HDMI 2.1 certified monitors.

What HDMI cable do I need for Lenovo IdeaPad Pro 5 Gen 8 AMD 4K 120Hz?

HDMI 2.1 certified cable rated at 48Gbps (Ultra High Speed HDMI). Look for HDMI 2.1 label on packaging. HDMI 2.0 (18Gbps) limits 4K to 60Hz maximum regardless of port capability.

Conclusion

Lenovo IdeaPad Pro 5 Gen 8 AMD Ryzen 7 7745HX HDMI 2.1 not working or limited to 60Hz in Windows 11 is resolved by replacing the HDMI cable with a 48Gbps-rated Ultra High Speed HDMI 2.1 certified cable, enabling HDMI 2.1 mode in the monitor OSD settings, and selecting 120Hz refresh rate in Windows Settings – Display – Advanced display. AMD Radeon driver update via Lenovo Vantage improves HDMI 2.1 DSC support for bandwidth-efficient high refresh rate transmission. These three elements (cable bandwidth, monitor HDMI mode, Windows refresh rate setting) must all be configured correctly simultaneously for 4K@120Hz output on the IdeaPad Pro 5 Gen 8 AMD HDMI 2.1 port.