LG UltraFine with DisplayPort?

HelloAgain16

macrumors newbie
Original poster
Nov 19, 2019
22
3
Hello alltogether,
I've got a little question concerning my new display. I would like to have an eGPU to power my LG UltraFine 5K Display and I always thought I need one of those RTX Founders Edition Cards with the USB-C Port to be able to drive it because the display only got a USB-C connector. But can I also use a DisplayPort to USB-C cable to drive the LG? Or is that another kind of signal that the UltraFine can't handle. Because if DisplayPort works, I wouldn't have to get the Founders Edition necessarily! Thanks for your answers!
 

fiatlux

macrumors regular
Dec 5, 2007
240
15
As far as I know there were two versions of the
LG UltraFine 5K Display: the first could only be driven by a Thunderbolt 3 source, the second one would also accept a USB-C Alternate mode input but only up to 4K.

The USB-C connector on the
RTX Founders Edition Cards does not seem to offer Thunderbolt 3 but Virtualink which seems to be a variation of
Alternate mode, which means it would only work with v2 of the display and only up to 4K.
 

HelloAgain16

macrumors newbie
Original poster
Nov 19, 2019
22
3
Thanks for your reply! So I have the Version 2 of the LG Display and 4k@60 would be enough for my purpose! So the VirtualLink would work right? But what if I try it with DisplayPort? Has anyone got experience with that?
 

Crash0veride

macrumors regular
Oct 10, 2016
169
86
Cincinnati
I use the 5k DisplayPort to type-c by moshi. Apple sells it on their site as well. I use it with an eGPU (rx580) and it outputs 5k on Mac and 4K in bootcamp (may work with default bootcamp video drivers but I use others). The downside is you can’t control the monitor brightness or volume with the DisplayPort cable like you could with a typical thunderbolt 3 cable. At least I have not found a way.