perhaps the bios disables onboard video when a discrete card is installed?
Thanks for joining the Graphics community.
I understand your computer is unable to detect Intel® Graphics Controller.
Vasco's comment is right. The onboard graphics solution is disabled electronically at BIOS level when you install an external video card.
Please check with Asus for BIOS settings that allows onboard graphics and video card work at same time.
FIXED IT! Couldn't detect the chipset either, so I installed the chipset driver, and somehow it worked
Thanks for the update, I'm glad it has been addressed.
This worked for me on an Asus Maximus VII Hero motherboard.
BIOS -> Advaced -> System Agent Configuration -> Graphics Configuration
Changed Primary Display to "CPU Graphics"
Changed CPU Graphics Multi Monitor to "Enabled"
This enabled the intel on board graphics and I was able to use NVIDIA GTX 660 as well.