HDMI 2.1 Bug on 2020 AV Receivers Affects Xbox Series X but Not PS5... Why?

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Published May 29, 2025

We test the Xbox Series X, Sony PS5 & RTX 30 Series cards with a Denon X2700H AV receiver to find out which ones successfully pass 4K@120Hz video signal using the HDMI 2.1 signalling method through the receiver to an LG CX OLED TV.

HDMI.org webpage on 4K120A vs 4K120B vs 4K120AB: https://hdmi.org/spec/hdmi2_1

Japanese teardown of PS5, revealing HDMI 2.1 chipset from Panasonic Semiconductor Solutions/ Nuvoton Technology (MN864739): https://www.4gamer.net/games/990/G999027/20201116053/

Zeskit Ultra High Speed HDMI Cable (certified HDMI 2.1 48Gbps) can be found here*: https://geni.us/hdmi21cable

*Disclaimer: This is an Amazon affiliate link, from which we may earn a small commission with each qualifying purchase to help us purchase more gear to review. Our analysis and opinion are never influenced by potential commissions.

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