PC Processors

[dsyben]

I have just built a new system with a Ryzen 5 5600x. I also have a second monitor (portable LCD) which uses USB-C (DP Alt mode).

I don'e have a USB-C port on my MB (ASUS B550M-A Wifi), and the monitor doesn't work with a USB-A to C adapter.

I know that my CPU doesn't have onboard graphics so can't utilize the MB display outputs.

What I can't find out anywhere is whether my CPU will support the USB-C (DP Alt Mode) if I buy a USB-C PCIe card.

I would love to know if it is a waste of time and won't work anyway before I go and order a USB-C card...

[elstaci]

you need a USB-C to HDMI/DP/VGA adapter not a USB-C to USB-A adapter.

[dsyben]

Thanks for your reply. I assume you mean I need that adapter if I am trying to plug it into my GPU?

The monitor I am trying to connect is a portable screen. Like a laptop screen without the laptop.
On my previous system (Intel NUC8i7BEH2) I used the display via a USB-C 3.1 port (built into the motherboard). It uses the Display Port over USB-C protocol.

What I am trying to ascertain is, will a PCIe USB-C expansion card enable me to connect it in the same way? Or will it not be passible because the CPU does not support it?

[elstaci]

What type of input does your portable screen use?

[dsyben]

It uses USB-C

The cable is USB-C to USB-C

This is the Display : AOC I1601FWUX

[elstaci]

The processor should have no problem with a PCIe USB-C card. Depends on your Motherboard Specs more than anything else.

This website shows the best USB-C PCIe cards for 2021 if interested plus it offers information on how to select the proper card for your PC: https://nerdtechy.com/best-usb-pcie-cards

All you will need is an extra PCIex1 Slot for the USB-C PCIe card.

[ryzen_type_r]

(I did a bunch of edits to my reply, sorry if you got a bunch of notifications)

So you already have a video card and monitor, but want to use this second DP Alt monitor?

Unfortunately, I can't think of a feasible way to do this.  That monitor requires to be connected to a USB C DP Alt capable port, because it needs power in addition to video signal.

[dsyben]

Yes, exactly! Sorry if this wasn't clear in my OP. 

I have a full size monitor and a GPU (MSI gt 1030). The GPU has Hdmi (attached to main monitor) and DVI (unused). 

I can try and find another monitor and connect to the DVI if I have to. But I already have the LCD and it is very compact and the perfect size, so would prefer to use that if at all possible. 

[ryzen_type_r]

DP Alt mode is essentially Displayport video signalling + power over a physical USB C connection.  So one end is your AOC monitor, and the other end would need to provide video and power.

Google-fu turned up this page:

https://dancharblog.wordpress.com/2020/07/20/add-usb-c-with-dp-alt-mode-to-your-desktop-pc/

The card requires a DP input (from your existing video card), and then takes power (not sure about this) from the PCI-E slot and combines them to a DP Alt mode capable USB C.  It also has another USB C port which is not capable of DP Alt mode (as alt modes are not mandatory for USB C).

You would also need a DVI to Displayport cable* since your video card doesn't have a Displayport output.

I've never tried any of this, so it might be hit or miss.

* However, these types of cables I think work one way only - Displayport at video card to DVI at monitor, the opposite of what you need.  But maybe you can use an HDMI to DP cable and use your HDMI connection to DP in on the card, and connect your primary monitor to DVI?