Interesting. So there is no point in making a HDMI 2.1 or a DP 2.0 expansion slot until a newer mainboard is released with a new chipset that can handle those speeds. Am I reading that correctly?
Another thought, if the expansion slots are using USB-C, assuming they are Thunderbolt 4 (I have no idea if they are), Thunderbolt 4 maxes out at 40 Gb/s. HDMI 2.1 is 48 Gb/s and DP 2.0 is 80Gb/s so I don’t think expansion slots would work even if the chipset supported it.
The exception here would be if the chipset supports DSC, which I believe it does since it is claiming 8K @ 60 hz over DP 1.4, which is only possible with DSC. Maybe someone at Framework can confirm this.
I believe 8k60 would use DSC, which is supported by 11th Gen Core Processors. DP 2.0 would not be possible on these CPUs, but could be on future platforms. HDMI 2.1 would depend on availability of a DP to HDMI bridge that supports it.
Yeah i’m not to concerned about it. I mainly use my ultrawide for work stuff.
I’m currently running it at 60hz from GTX760 and have no real need for higher FPS other than wanting to run it at full spec since i paid for it.
It can do up to 240Hz so I was curious how far above 60 it might go.
Looks like 130Hz maybe.
It depends on the drivers and resolution and pixel format and display. My calculations were for 8bpc RGB. DisplayPort can do 6,8,10,12,16bpc and HDMI can do the same except 6bpc.
You can reduce components per pixel (normally 3 components per pixel) by using chroma sub sampling 4:2:2 (16 components per 8 pixels) or 4:2:0 (12 components per 8 pixels). Chroma sub sampling throws away some color info (the color info has lower resolution than luminance info). So greyscale text should look ok but coloured text on coloured background will be blurry. Some displays don’t support chroma sub sampling. Chroma sub sampling might not be supported for some resolutions or refresh rates.
If DSC (visually lossless compression which looks much better than chroma sub sampling because it’s smarter about what info it throws away) is supported then that can effectively double or triple the allowed bandwidth. I think in macOS the bandwidth is doubled from 8bpc (24bpp) because DSC switches to 12bpc with 3:1 compression to 12bpp. I’m not sure how you would get that info in Windows or Linux.
one more question regarding external monitors:
If I understand it correctly Tiger Lake supports up to 4x4k60.
If I connect 2x4k monitors it would drive them with up to 120Hz each via DP (but prob. only if I disable the integrated display)?
Thanks a lot!