Custom Resolution Utility (CRU)

[ToastyX]

(12-14-2022 03:01 PM)Real Phobo Wrote:  I'm trying to get a resolution of 3072x1728 @ 30 Hz to run via an old passive DisplayPort to HDMI cable on Intel UHD Graphics, but so far to no avail.

The cable is limited to 165 MHz, but even a 163.80 MHz configuration of said resolution, as calculated using your Pixel Clock Calculator, won't be displayed.

I've tried several manual blanking settings, but the resolution just won't appear in the Windows Display Settings pull-down menu. It will work at 24 or 25 Hz, though, so there seems to something other than the cable's bandwith limit to be limiting the reported output capabilities.

Do you know a solution to this?

I was able to successfully establish 3008x1728 @ 30 Hz as the highest resolution on this cable, but I believe a bit more should be possible with regards to the reported bandwidth requirements.

I don't know what limits Intel's driver has because I've mainly only used AMD/ATI and NVIDIA GPUs. AMD's driver will listen to the pixel clock limit in the range limits descriptor if there is one, so maybe it was set to 160 MHz because it must be a multiple of 10 MHz and Intel's driver is still enforcing that even though CRU doesn't include it by default except for FreeSync monitors. Check the "Edit..." button at the top and try including the range limits with the pixel clock set to 170 MHz. AMD's driver also ignores resolutions with less than 56 horizontal blanking, so maybe Intel's driver has its own blanking limits. Another possibility is the pixel clock limit for Intel GPUs might be different when using an adapter, or maybe there is a megapixel limit of some sort.