My experience trying to run dual Asus XG27JCG 5k 120hz+ on m2/m4 macs

[Anonymous Freak]

The only problem is that this is technically impossible. Conversion HDMI->DisplayPort (unlike reverse DisplayPort->HDMI) requires an active adapter/cable. A basic passive DisplayPort->HDMI cable cannot be used in the reverse direction.
Also as I said earlier HDMI port on the M1 Max Mac Studio is 2.0 so it cannot drive resolutions larger than 4K@60.
So I think there was some misunderstanding. Are you sure this test:

was performed correctly? Maybe there was another cable connected to the mac at the same time?

Double checking, you are correct. In all my cable-swapping of every cable to each monitor every which way, I must have thought I did HDMI->DP, but looking closer, it appears I only tried the DP->HDMI direction to the 5K display. Because that cable is run through a cable trough on my monitor arm I know I didn't undo, and I don't have any other HDMI<->DP cable I could have tried in the other direction.

 

[StevenJobsJr]

I have this monitor now, really impressed so far. At first when I connected my Dell 7450 via USB-C I was only able to get 5k 60hz, however there is a handy setting in the monitor that allows you to toggle between USB 2.0 and 3.2 bandwidth on the USB-C port. Reducing the bandwidth to 2.0 allows my Dell 7450 to now run at 5k 120hz.

View attachment 2614587

That's a cool desk. Do you mind sharing its name?

 

[LiE_]

That's a cool desk. Do you mind sharing its name?

It’s a Vernal Space desk, solid maple top.

Vernal Core3 Solid Hardwood Standing Desk

Vernal solid wood standing desk is crafted from premium North American hardwood for superior durability, elegant wood grain, and a seamless wide-plank design—perfect for modern, ergonomic workspaces.

vernalspace.co.uk

 

[yuri32]

Hello everyone. I recently ordered this XG27JCG monitor, and I can't figure out how to connect it to my MacBook Pro M4 Pro: USB-C Thunderbolt 4/5 or HDMI 2.1. Can you please advise me on the correct connection method?

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[thenewepic]

Can you please advise me on the correct connection method?

all methods are correct. If you need a USB Hub functionality then choose USB-C. If you don't need a hub then choose whatever you like.

 

[yuri32]

all methods are correct. If you need a USB Hub functionality then choose USB-C. If you don't need a hub then choose whatever you like.

Is the USB-C port on this monitor capable of receiving a signal from a Mac, so that the resulting image has a 5K resolution at 120 Hz? And what Thunderbolt cable is needed for this? Or can I simply use a Type-C to DP 1.4 adapter, as shown in the photo?

 

[thenewepic]

Is the USB-C port on this monitor capable of receiving a signal from a Mac, so that the resulting image has a 5K resolution at 120 Hz

yes, it is.

And what Thunderbolt cable is needed for this?

Basically any passive TB3/TB4/TB5 cable or any active TB4/TB5 cable. Or any USB4 40+Gbit cable.

Or can I simply use a Type-C to DP 1.4 adapter, as shown in the photo?

such an adapter will also work (without USB Hub functionality in this case, of course).

 

[yuri32]

yes, it is.

Basically any passive TB3/TB4/TB5 cable or any active TB4/TB5 cable. Or any USB4 40+Gbit cable.

such an adapter will also work (without USB Hub functionality in this case, of course).

Thanks. It seems I was wrong about the Mac transmitting the image in 5K. In the end, it all depends on the resolution set on the Mac itself. I have 1800x1169 for example, and for this resolution, you don't need a cable and a TB-5 port.