Re: I would like to power the other 2 monitors via Display Port to USB-C Cables. did you plug in AC power cord of the other two monitors?  spec: Use a USB Type-C cable to provide power (up to 65 W) to a compatible notebook while receiving video and data signal.The USB-C power delivery of the monitor is upstream, so it can power a laptop like an AC adapter, but it can not be used to receive power from a video source such as DP signal from 8940.  DP video never carry power to a display monitor.  The display monitor receiving DP video always needs its own power from wall. Re: I experimented on a Dell laptop using the same cables USB-C connected to the laptop and HDMI on the monitor works. But when I reverse them so HDMI on the laptop and USB-C on the monitor it does not. The USB-C video input port on monitor works only with DP video signal, not HDMI. You can use laptop USB-C video out port to send video signal to monitor via a USB-C cable.
I just got a XPS 8940 with the RTX 3060 Ti graphics card and three S2722DC monitors. The RTX 3060 Ti has one HDMI port and three DisplayPort. I am trying to connect to the three S2722DC monitors via DisplayPort to SB Type-C and HDMI to SB Type-C cables. I am unable to get anything to display on the monitors this way.  The S2722DC monitors have two HDMI ports and one USB Type-C. The only way I have been able to get a display to work is by using the single HDMI port on the graphics card to a HDMI port on the monitor. But I would like to power the other 2 monitors via Display Port to USB-C Cables. I have updated all drivers except monitors firmware and have tried multiple cables. When I called up Dell they wanted to change the motherboard and graphics card but I'm inclined to thing the issue is not hardware... Also I experimented on a Dell laptop using the same cables USB-C connected to the laptop and HDMI on the monitor works. But when I reverse them so HDMI on the laptop and USB-C on the monitor it does not. So I think it might be a incompatibility issue...Please help. Please Help.
XPS 8940, three S2722DC, RTX 3060 Ti