XPS 8700, cannot enable integrated graphics card

I've done much reading in the forums and updated the BIOS to enable the "Intel - Multifunction display". I only run 60mhz on my two monitors - one is a dell U3415w and the other is an asus pb328q. I also ran a BIOS update since it hasn't been updated in a while but that did not make any difference. I checked device manager and the Intel on-board graphics card isn't showing at all. OK, I figure the driver is not installed so when I download the identified intel driver (for my express code only) it gives me that my 2014 XPS 8700 does not meet the minimum requirements etc etc. 

https://www.dell.com/community/XPS-Desktops/XPS-8700-onboard-graphics/td-p/7680018

I see in this thread a poster name Mary says in this Dell XPS 8700, the integrated graphics is disabled, whether the display port or the HDMI, once you have a discreet graphics installed. I really haven't seen anyone have success in any threads on this forum. I actually tried booting the machine with one monitor connected only to the integrated graphics hdmi port and I was getting an error that it's an invalid configuration (or the sort). 

I don't think I can install a secondary gtx745 off ebay or so since there's no PCI slot like what is used now. I only use for mainly work related stuff (excel, browser, outlook email, etc) and no gaming requiring high performance. Not sure you'll call watching youtube high performance demand other than high quality video. 

Anyone else have any luck. Personally, I'm disappointed I'm only discovering this now as the tower was more a media machine for the family TV. I bought a Dell XPS 15 8 months prior to this in 2014, and that outputs dual monitors no problem though limited to 1080p max only on the 2nd one off the integrated graphics card.