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VRR on this tv supports 4k @ 144hz and 1080p @ 240hz
Sorry, there was a problem. Please try again later.HDMI 1 is capable of 4K/144Hz and HDMI 2 is capable of 4K/120Hz. 144Hz is only supported when VRR (Variable Refresh Rate) is enabled. You can visit https://www.tcl.com/us/en/products/home-theater/qm7-class/55-class-4k-qd-mini-led-qled-hdr-google-tv-55qm751g and find the Quick Start Guide located under the "Downloads" section. The page labeled 1 has a further breakdown of supported resolutions. Hope this helps! Thank you, TCL Customer Support
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