[NAME] wrote "The NVIDIA card has only one connection.", that statement cannot be true. Typically, the GTX 1060 has three connections, HDMI. DVI, and DisplayPort. Since your GTX 1060 is a Dell OEM card the connections may vary, but I am pretty sure it cannot just have one connection. If you go to the Dell support site for the U2713H you would see there is a monitor driver, DELL_U2713HM-MONITOR_A00-00_P152W.exe, 371.43MB, The driver supports Windows 7, 8, 8.1, and Vista. I would try that driver.
My DELL U2713H monitor has been running at a resolution of 2560x11440 for several years. Today it changed to 1920x1080. I cannot find any setting to change it back. I have updated the Intel UHD Graphics 630 drivers, the listed modes only go to 1920x1080, driver version 20.20.100.7263 (9/25/2019). How do I reset so that my monitor runs are the highest designed resolution?
U2713H monitor changed, cannot reset to 2560x1440