Probook external displays and eGPU

[bkwhy]

Hey there.

How many unique external displays may be connected to the 445 G9? The probook display is obviously one (1) display. The HDMI connector is obviously two (2) displays. The usb-c port label matches with "USB Type-C power connector port, SuperSpeed 10 Gbps port, and DisplayPort output". If I connect a USB-C-to-DisplayPort adapter P/N:831753-001, will I get a duplicate [of the HDMI port], or is this unique display three (3)? And, can I connect either of USB-C-to-HDMI 2.0 adapter P/N:935325-001 or USB-C-to-VGA adapter P/N:831751-001 and get a unique display?

Bonus question. What are the options for connecting an eGPU (pciex16) to this usb-c port.

Thanks.

[banhien · Accepted solution]

@bkwhy 

Its specs:    https://support.hp.com/us-en/document/ish_5493150-5493249-16

It has followin ports:

(1) USB 3.2 Gen 2 Type-C 10 Gbps signaling rate port (USB Power Delivery, DisplayPort 2.0)

(3) 3.2 Gen 1 Type-A 5 Gbps signaling rate ports

(1) AC power input port

(1) HDMI 2.0b port

(1) Headphone/microphone combo jack

(1) RJ-45 connector

You can use at least 2 external monitor using HDMI & USB-C ports. Using a right docking station such as HP USB-C G5 dock, you can connect to more external monitors depending the resolution and refresh rates. Manual for the HP USB-C G5 will show you more information and how to connect.

Bonus answer: No, it does not have internal nor external which is fast enough to support a good eGPU.

Regards.

[bkwhy]

Thanks for answering the original question. If I connect a monitor to the usb-c port using the adapter, I will get another display.

But now I am curious. You mentioned that the actual number of possible displays depends on the bandwidth of the display port connection and the resolution of each display (and the Hz,like 60Hz or 120Hz, etc). Got it. Assuming the usb-c port operates in Alt-Mode DP when connected to the P/N:831753-001 USB-C-to-DisplayPort adapter (or maybe at all times?), what is the maximum bandwidth? I am certain this depends on transmission mode, like UHBR 20, and, number of lanes/links, and, maybe, the resolution of the external monitor connected to the HDMI port (which may use a lane/link?), and, possibly, the laptop FHD display (which may use a lane/link?).

For SST (Single Stream Transport), which is my intent, bandwidth is probably adequate for any single connected monitor. But for a MST (Multi-Stream Transport) splitter (1?4 maybe), or, a dock station with additional ports like the G5, it could be an issue. Thus the "Bonus Bonus Question".