I have a Microsoft Surface Laptop 3 with the i5-103G7 processor. I found this comment on the GPU:
"The Iris Plus G7 supports three display pipes that can each output 5K60 signals (via DisplayPort 1.4 HBR3 or HDMI 2.0b). Combining two pipes, the chip is capable to output 8k content."
And according to the intel specs at https://ark.intel.com/content/www/us/en/ark/products/196592/intel-core-i5-1035g7-processor-6m-cache-...
My laptop has a USB C port but no Display Port. I currently have a TVMonitor connected via a USB3 hub with an HDMI output.
I assume I need a USB C port with more HDMI ports?? I can just select the TV Monitor, leaving the laptop display blank, so can I have 3 external monitors??
The processor supports three Display Pipes (DPI). These DPI can be configured as DisplayPort (DP) 1.4a, Embedded DP (eDP) 1.4b or HDMI 2.0b. The processor can support a maximum of three displays. Displays are not 1:1 tied to the DPI. That is, you could have all three displays connected to only one DPI.
My assumption is that the Surface Laptop 3 is using the DPI as follows:
Since the Embedded Display counts against the display count, you can only connect two external monitors to the processor. To have a third external monitor, you must connect it using a USB-based graphics engine.
Ok, there are a number of options for how you can connect two external displays to this laptop:
For option 1, the USB-based graphics engine can be plugged into the Surface Dock or into the USB-C connector. For option 2, a USB-C hub could connect both the USB graphics engine and a display. Alternatively, the USB-C hub could be avoided by connecting the USB graphics engine to the laptop's USB 3.x port. For option 3, you are forced to connect the USB graphics engine to the laptop's USB 3.x port.
That's as far as I can take the analysis. My assumptions need to be verified to go further,
Thanks for that comprehensive answer. I should of added that I currently have a USB C dock with an HDMI output to a Samsung 28" TV Monitor which works well at 1920x1080p for the F1 2019 game. Just thinking of what else I could do!!