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Lenovo Thinkpad Thunderbolt4 Dock does support HDMI 2.1 output with 4k@120hz G-Sync to LG CX w/ Legion 7i RTX 3070 : r/UsbCHardware
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Product | Lenovo ThinkPad Thunderbolt 3 Dock Gen2 - port replicator - Thunderbolt 3 - 2 x HDMI, 2 x DP, Thunderbolt - GigE
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