1-2 of 2 Answers
Hello there, Bob. We understand your inquiry about whether your LG 55" Class 85 Series QNED 4K UHD Smart webOS TV (Model 55QNED85TUA) can run 120 Hz at 4K when connected to gaming systems. Below is detailed information on how to enable and troubleshoot 4K @ 120 Hz gaming on this TV, along with a helpful step you can take to ensure everything is configured correctly. 1. HDMI 2.1 Inputs for 4K @ 120 Hz Your 55QNED85TUA comes equipped with four HDMI inputs (all HDMI 2.1), which are capable of handling 4K @ 120 Hz signals from the latest gaming consoles (such as PlayStation 5 and Xbox Series X). By design, HDMI 2.1 supports a peak bandwidth up to 48 Gbps—enough to carry uncompressed 4K video at 120 Hz with HDR. To make use of 4K @ 120 Hz, you must: Plug your gaming console into one of the HDMI 2.1 ports (HDMI 1, 2, 3, or 4 all support HDMI 2.1 signal bandwidth). Use a certified Ultra High Speed HDMI cable (included with most consoles, or sold separately) to ensure the full HDMI 2.1 bandwidth is available for 4K @ 120 Hz + HDR. 2. Enabling “HDMI Ultra HD Deep Color” (Troubleshooting Step) Even though the physical ports are HDMI 2.1, the TV’s software requires you to turn on “HDMI Ultra HD Deep Color” for the port you’re using. This setting allows the TV to open the full HDMI 2.1 pipeline; otherwise, it defaults to a lower data rate that only supports 4K @ 60 Hz. Here’s how to enable it: On your TV remote, press Settings (the gear icon). Navigate to All Settings → Connection → HDMI Input Settings → HDMI ULTRA HD Deep Color. Find the HDMI port number (e.g., HDMI 1, HDMI 2, HDMI 3, or HDMI 4) where your console is connected, and switch “HDMI ULTRA HD Deep Color” to On. Power-cycle both your TV and gaming console: turn them off, unplug for 30 seconds, then plug back in and power them on (TV first, then console). This ensures the console negotiates a new “handshake” with the TV at 4K @ 120 Hz. If your console’s video output is set to 4K @ 120 Hz and its HDMI cable is firmly plugged into an HDMI 2.1 port with “HDMI Ultra HD Deep Color” enabled, your TV should automatically detect the higher refresh rate. You can verify this by: Going to the TV’s Settings → All Settings → Sound & Picture → Picture Mode → Game Optimizer. Within Game Optimizer, look for “4K @ 120 Hz” to confirm the resolution and refresh rate currently being received. On your console (for example, on an Xbox Series X), go to Settings → General → TV & Display Options and confirm that “4K UHD” and “120 Hz” are active under “Refresh Rate.” 3. Using Game Optimizer & Game Dashboard To ensure the smoothest experience, place the TV in Game Optimizer mode once 4K @ 120 Hz is enabled. This automatically adjusts input lag, disables unnecessary post-processing, and optimizes colors for gaming. Access it via: Settings → All Settings → Sound & Picture → Picture Mode and select Game Optimizer. Inside Game Optimizer, you’ll see an on-screen “Game Dashboard” overlay. It displays real-time information—such as resolution, refresh rate, VRR (Variable Refresh Rate) status, and HDR mode—so you can confirm that 4K @ 120 Hz is active. 4. Confirming VRR / AMD FreeSync Compatibility Your 55QNED85TUA also supports AMD FreeSync (VRR) to prevent screen tearing at higher refresh rates. In Settings → All Settings → Sound & Picture → Picture Mode, after selecting Game Optimizer, scroll down to Game Adjust and turn on AMD FreeSync Premium. If your console or PC supports VRR over HDMI 2.1, this will further enhance responsiveness and visual smoothness when running games at 4K @ 120 Hz. 5. Potential Issues & Additional Tips If you still see “4K @ 60 Hz” instead of 4K @ 120 Hz: Double-check that your console is set to output at 4K @ 120 Hz (verify in the console’s video settings). Confirm the HDMI cable is firmly seated in the TV’s HDMI 2.1 port (removing and re-inserting can help the handshake). Make sure the TV’s firmware is up to date: Settings → All Settings → General → About This TV → Check for Updates. Updating can fix HDMI handshake bugs. If you experience screen flicker or loss of video when switching to 4K @ 120 Hz, try toggling “HDMI Ultra HD Deep Color” Off and then back On, and repeat the power-cycle step above. 6. Summary Yes, the 55QNED85TUA supports native 4K @ 120 Hz for gaming systems via any of its four HDMI 2.1 inputs—provided you enable HDMI Ultra HD Deep Color on the chosen port and use a certified Ultra High Speed HDMI cable. Use Game Optimizer mode to view real-time confirmation of 4K @ 120 Hz operation, and enable AMD FreeSync Premium if you want VRR support. https://www.bestbuy.com/site/lg-55-class-85-series-qned-4k-uhd-smart-webos-tv-2024/6578183.p?skuId=6578183 If you have any remaining questions or run into trouble confirming 4K @ 120 Hz on your console, please send us a private message on social media @LGUSSupport. Our team will be happy to walk you through additional steps or check for any unit-specific updates. We appreciate your patience and are here to ensure you enjoy the full gaming potential of your LG QNED TV! —Renzo
Sorry, there was a problem. Please try again later.Yes
Sorry, there was a problem. Please try again later.