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TCL 4K TVs do feature all ports with HDMI 2.0, so they are capable of supporting Chroma 4:4:4. But the performance will depend on: 1. Set the HDMI mode to HDMI 2.0 under the TV’s “TV input” menu setting; 2. Make sure that a good quality high-speed HDMI cable is used; 3. Make sure that the source device is capable of supporting 4K output with 4:4:4 chroma; 4. Supported resolutions and frame rates with 10-bit 4:4:4 chroma include: 1080p/60Hz and 2160p/30Hz. With 8-bit 4:4:4 chroma: up to 2160p/60Hz; 5. To ensure best compatibility with various PC graphic cards and 4:4:4 output, select “computer” as the name of HDMI input in the Settings / TV Inputs menu. Thank you, TCL Customer Support
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