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  1. Discussion

Additional Review Notes: Supported Resolutions

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As one of the first generally affordable HDMI 2.1 monitors, we decided to dig a bit deeper into the supported resolutions and console compatibility of this model. There’s some conflicting information out there, so we wanted to make sure it was clear to everyone what formats would be supported on this monitor depending on their source. Since we don’t really have a dedicated place in our reviews for this information at the moment, we’ll condense it here for everyone.

This is what the monitor supports depending on your source:

DisplayPort - Graphics card with DSC (NVIDIA 20-series+. AMD RX 5700+)

Over DisplayPort, these cards can transmit a visually lossless signal using DSC (display stream compression) over DisplayPort 1.4. They support the full capabilities of the monitor, including up to 4k @ 144Hz with 10 bit color and no subsampling (i.e., 4:4:4 or RGB are supported and displayed properly).

DisplayPort - Graphics card without DSC

If your graphics card doesn’t support DSC, you’ll be limited to a maximum of 4k 60Hz with 10 bit color and no subsampling (4:4:4/RGB). DisplayPort 1.4 should support up to 4k 120Hz with 8 bit color and no subsampling without DSC, but this option wasn’t exposed by the EDID. We tried forcing it with a custom resolution, but we were locked at 6 bit color.

PS5 or Xbox One X

Everything is supported on the next-gen consoles, with the exception of Dolby Vision, as the Gigabyte M28U doesn’t support Dolby Vision. On the PS5, 4k 120Hz is limited to YUV420, also known as chroma 4:2:0. This limitation is mentioned on Gigabyte’s website, and it’s a limitation of the PS5 itself. It doesn’t make a noticeable difference in picture quality. Xbox One X supported formats PS5 supported formats

HDMI - Graphics card with HDMI 2.1 (RTX 30-series+, AMD RX 6800+)

With a recent graphics card that supports HDMI 2.1, the monitor supports the same formats as it does over DisplayPort. DSC on both HDMI and DisplayPort is visually lossless, though, so this doesn’t make a difference in picture quality. As long as your GPU is working properly and you have a good cable, HDMI 2.1 supports up to 4k 144Hz with 10 bit color and no chroma subsampling (i.e., 4:4:4 or RGB are supported and displayed properly).

HDMI - Graphics card with HDMI 2.0

If your graphics card doesn’t support HDMI 2.1, the HDMI 2.0 bandwidth limitations apply. The monitor will be limited to 4k 60Hz with 8 bit color and no subsampling (i.e., 4:4:4 or RGB), or 4k 60Hz 10 bit color with either 4:2:2 or 4:2:0 chroma subsampling.

You can learn more about chroma subsampling here, or about HDMI 2.1 here.

Note that in the above cases where bandwidth is a limitation (HDMI 2.0 or a DisplayPort without DSC), it might be possible to run the monitor at 120Hz or 144Hz at a lower resolution (1440p or 1080p), but we haven’t tested that.

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