Running two 4k monitors through SP4 Dock

Discussion in 'Microsoft Surface Pro 4' started by JordanAT, Feb 15, 2016.

  1. JordanAT

    JordanAT Member

    Nov 1, 2015
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    Recently I had my SP4 replaced, and as part of my new install I used the Intel beta drivers. I had been running my 4k monitors as one off the SP4 dock and one off the SP4 port. When I connected up to my pair of 4k monitors I decided to see if the Intel HD Control Panel which installs with the beta drivers would give me more control. I connected both monitors to the Dock (mDP->DP).

    The control panel kept setting one of the two external monitors to match the internal panel (defaulting back to 1920x1080 for both). BUT by turning off the internal panel, I was able to run both external 4k monitors at 4k/30Hz. I tried to increase the refresh to 50Hz and was unsuccessful. When I added the SP4 panel to the mix *as a third monitor*, the external monitors dropped to 29Hz, but all three displays worked.

    Just thought you all might like to see this one [semi-successful] data point.

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sp4 not able to extend the monitor with the sp4 dock