Intel HD4000 running UHD (3840x2160) over HDMI

[AHann]

Yes, this actually is possible!

Tested and running under Win8.1, latest drivers and a Hisense 55K680UAD UHD TV.

The trick is to keep the pixel clock to less than the 225Mhz HDMI maximum for this hardware.

Using CustomModeApp.exe (part of the Intel driver software) select the display and then go to advanced.

Use the following settings:

SettingHorizontalVerticalFront Porch483Back Porch8023Sync Width325Active38402160Scan Rate25

Save.

This creates a dot clock of 221Mhz and relies on the display supporting 24Hz which is a scan rate used by blue-ray film.

Then using the Intel Display Panel (it will need to be re-opened to get the new setting), Select the new mode.

A reboot may be required for this resolution to be visible in the Windows Screen Resolution panel.

[Jose_H_Intel1]

Thank you for sharing your results even though the maximum supported resolution is 2560 x 1600.

https://software.intel.com/en-us/articles/3rd-gen-hd-graphics-quick-reference-guide https://software.intel.com/en-us/articles/3rd-gen-hd-graphics-quick-reference-guide

[MMich18 · Accepted solution]

With the new Anniversary Update to Windows 10, I can no longer sync at 25mhz. Any ideas? Also, I was unable to locate CustomModeApp.exe on my system. Any idea what folder it should be in?