XPS SPECIAL EDITION 8900 UNABLE TO ACCESS NIVIDA SETTINGS
The user manual for the XPS 8900 shows one HDMI Port. If you connect your monitor to this port for the XPS 8900 SPECIAL EDITION, the NIVIDIA setup will not be available. There is another UN-referenced HDMI Port on the panel below the Audio Ports. This connects directly to the GeForce GTX 960 Card. Maybe the manual diagram needs to be updated to show this.