Linux Driver support for 8k
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This is the correct answer. Using my 6900XT, I can't run a 4k120hz display over HDMI without DSC.
This hopefully will change with the new AMD GPUs, but that's wishful thinking.
As a 6700XT owner, I use 4k@60Hz (my screens can't do better anyway). Does that mean I would need to use DisplayPort for better output in the future?
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As a 6700XT owner, I use 4k@60Hz (my screens can't do better anyway). Does that mean I would need to use DisplayPort for better output in the future?
You can go higher that 4k@60 but youll be using chroma subsampling. Which can make text look really bad.
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You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.
Based on your comment, I understand that AMD GPUs aren't capable of 8k@60 over HDMI. Is that the case? If so, why?
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Based on your comment, I understand that AMD GPUs aren't capable of 8k@60 over HDMI. Is that the case? If so, why?
AMD made an open source driver for HDMI 2.1 but HDMI forum won't approve. They locked down the specification for 2.1 and say the driver would reveal it.
https://www.howtogeek.com/hdmi-forum-open-source-drivers-hdmi-2-1/
I don't know if an earlier version can do 8k@60HD.
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Based on your comment, I understand that AMD GPUs aren't capable of 8k@60 over HDMI. Is that the case? If so, why?
Only on Linux, because the HDMI forum didn't allow AMD to write an open source driver with HDMI 2.1 features
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It's a bad combo in my opinion. The HDMI forum hates Linux so we mostly use display port. If you need HDMI 2.1 or higher for 8k I don't know if it will work. It might end up with a really low frame rate. It is a crazy low end graphics card for 8k. That's a low end 1080p card as far as games go. DRM is a problem with crappy companies like Netflix, so you will probably be watching upscaled standard def pictures. They must want us to pirate.
The TV has built in NetFlix and YouTube so I don't have much need for playing video from Linux. Currently YouTube is the only source of 8K video that I'm aware of.
I know it's low end, I just don't want to spend much money. It seems likely that one way or another I'll find some problem with whatever card I get and want to replace it in a couple of years so I don't want to spend much.
The card is documented as having HDMI 2.1.
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You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.
That card has DisplayPort 1.4 which means that if HDMI doesn't work then it's limited to HBR3 which gives 24bpp@31Hz, which is barely adequate.
Also how do you set the bpp rates? The DisplayPort wikipedia page says that 24bpp and 30bpp are supported, but how do I even know which is in use?
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You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.
MAXSUN Intel Arc B580 Milestone 12G Graphics Card (MS-ARC-B580-MILESTONE-12G
The above is the cheapest card from my local store that has DisplayPort 2.1 (the rest have 1.4). It's $469 compared to $199 for a RX 6400 or RX 6500. I can probably find somewhere cheaper to buy these things but I'm working on the assumption that the ratios of prices are going to be about the same.
From the Wikipedia page it looks like DSC is needed to do 8K@60Hz on DisplayPort 1.4. I think that is bad for text though.
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That card has DisplayPort 1.4 which means that if HDMI doesn't work then it's limited to HBR3 which gives 24bpp@31Hz, which is barely adequate.
Also how do you set the bpp rates? The DisplayPort wikipedia page says that 24bpp and 30bpp are supported, but how do I even know which is in use?
Ah yes, did mess up looking at the specs table for nitrate modes. Correcting root comment for anyone else who views this thread.
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MAXSUN Intel Arc B580 Milestone 12G Graphics Card (MS-ARC-B580-MILESTONE-12G
The above is the cheapest card from my local store that has DisplayPort 2.1 (the rest have 1.4). It's $469 compared to $199 for a RX 6400 or RX 6500. I can probably find somewhere cheaper to buy these things but I'm working on the assumption that the ratios of prices are going to be about the same.
From the Wikipedia page it looks like DSC is needed to do 8K@60Hz on DisplayPort 1.4. I think that is bad for text though.
DSC is lossless compression.
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DSC is lossless compression.
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