I have an XPS 8700 which has a GT 635 video card with DVI and VGI connectors, both of which are in use.  Below the rear panel USB connectors are an HDMI port, which is blocked off, and a Display Port connector which appears to be available for use.  Can I use this Display Port in addition to the DVI and VGA ports? Elsewhere in this community (https://www.dell.com/community/Monitors/U2414H-XPS-8700-No-DP-display/td-p/4280646) it states that I should have an HDMI, DVI and VGA ports available but not a Display Port. Basically, I want a 3rd display; I don't particularly mind what interface I use.