Extended dual HDMI supported by Windows only
(Microsoft Surface Pro2, Pro3, Pro4, Book supports MST+HBR2)

Model

Mini DisplayPort

MST

Graphics card

Surface Pro

DP 1.1

No

Intel HD Graphics 4000

Surface Pro 2

DP 1.2

Yes

Intel HD Graphics 4400

Surface 3

DP 1.1

No

Intel HD Graphics (Cherry Trail)

Surface Pro 3

DP 1.2

Yes

Intel HD Graphics 4200

Intel HD Graphics 4400

Intel HD Graphics 5000

Surface Pro 4*

DP 1.2

Yes

Intel HD Graphics 515

Intel HD Graphics 520

Intel Iris 540

Surface Book

DP 1.2

Yes

Intel HD Graphics 520

• The graphics card requires a minimum of DisplayPort 1.2 with MST+HBR2 for dual independent display output (Microsoft Surface Pro2, Pro3, Pro4 and Book support MST+HBR2).
* Mac OS X does not support extended mode