Mary G is correct. The added Nvidia GTX 1660 Ti video card has three video out ports = HDMI 2.0b/DP 1.4/DVI-DThe U2720Q has the following video in ports = HDMI/DP/USB-C Your connection options are as follows =Nvidia GTX 1660 Ti DP out --> DP to DP cable --> U2720Q DP inNvidia GTX 1660 Ti HDMI out --> HDMI to HDMI cable --> U2720Q HDMI in
My computer is not transmitting HDMI signal to my monitor. The monitor works fine I connected it to another computer.  The HDMI cable works fine. I recently upgraded to Windows 11 from Windows 10. This is the first time trying to use the computer since the upgrade. The computer is an XPS 8940,  , Computer Purchase Date April 17,2021, The monitor is U2720Q. I've never had a problem with this computer until the upgrade to Windows 11. Please help Thanks, John
XPS 8940, U2720Q, no HDMI device found