Dell Alienware 17 R2 (Early 2015) - Manual (Page 35)

Troubleshooting
Issue Solution
Graphics card is not detected Download and install the latest driver
for the video card installed in the
Alienware Graphics Amplifier. For
more information, see the document
that came with the video card you
purchased.
NOTE: The graphics card is sold
separately.
The video ports and the display on
your computer will be disabled when
a dual core graphics card is used The output will be from Alienware
Graphics Amplifier only. Your device is
working as designed.
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