Hi, thanks for asking about the Samsung Q90T. Because HDMI 2.1 is a complicated spec, we hope that focusing on TV features will be more helpful to you when deciding on the best model for your usage scenario. All 4 HDMI ports on this model offer VRR, FreeSync, and Auto Low Latency Mode (Auto Game Mode)
-- HDMI 3 also has eARC
-- HDMI 4 supports 4K@120fps (FRL)
Samsung is always here to help. If you have further questions, please reach out to us at 1-800-SAMSUNG. ^Celina