AMD’s next-gen RDNA 5/UDNA GPUs will support HDMI 2.2 at 80 Gbps

AMD reportedly plans to support HDMI 2.2 with its next-generation graphics cards, with 64 Gbps and 80 Gbps support

According to @Kepler_L2, AMD plans to support HDMI 2.2 on its next-generation RDNA 5/UDNA (gfx13) graphics cards. Through HDMI 2.2, these next-generation graphics cards will reportedly support speeds of 64 Gbps and 80 Gbps, but not the full bandwidth capabilities of the new HDMI standard.

HDMI 2.2’s bandwidth maxes out at 96 Gbps, implying that RDNA 5/UDNA graphics cards will not offer full support for the standard. However, 80 Gbps is 60% faster than the 48 Gbps speeds offered by HDMI 2.1, representing a significant bandwidth increase.

AMD’s current-gen GPU architecture is RDNA 4, which supports the full bandwidth of HDMI 2.1. AMD’s next-generation graphics architecture is called “UDNA”, though many claim that it was initially developed under the “RDNA 5” name. With UDNA, AMD is merging its RDNA (Radeon DNA) and CDNA (Compute DNA) architectures to create a “Unified” UDNA GPU architecture. This move will bring together AMD’s gaming and AI architectures, simplifying their development.

(@Kepler_L2 on Twitter/X)

Currently, it is unclear if AMD’s 80 Gbps HDMI 2.2 bandwidth limit applies to gaming GPUs or all of AMD’s next-gen RDNA 5/UDNA graphics cards. It is not uncommon for AMD’s “PRO” series GPUs to support more bandwidth than their mainstream/gaming counterparts.

Modern OLED TVs are starting to push for higher refresh rates. Today’s OLED TVs can support 4K at up to 165Hz with compatible PCs. With HDMI 2.2, even higher refresh rates will be supported. Furthermore, HDMI 2.2 will allow high refresh rate monitors to have more versatile input options, and could help push resolutions and refresh rates higher. After all, HDMI 2.2 can support 96 Gbps speeds, which is more than what DisplayPort 2.1 can handle.

You can join the discussion on AMD’s rumoured plans for HDMI 2.2 support on the OC3D Forums.