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Comment by drorco | Hacker News Reader

I haven't yet seen screens with USB-C support that have refresh rates higher than 60hz, unfortunately.

USB-C to Displayport cable. I use a 144Hz gaming screen with my Mac mini in this way

Which display are you using and does it wake up properly when you wake your mac mini? I've had a problem with displays that wake up normally with an intel based mac but not with an M1 mac.

I'm also using a 144hz monitor (Samsung 28" G70A) with a DP-USB-C cable. Wakes up normally and VRR works both with my new MBP (M1 Pro) and with the previous MBA (M1).

Is it an ASUS display? I have had multiple ASUS displays exhibit this problem. I think I have replicated it with other non-Apple machines as well.

No, LG and Samsung for me. They wake up just fine with my intel mac but not with my M1 Max. My Dell monitor works fine with both.

Like others have mentioned, I've used displayport over usb-c for high-refresh rate at high resolution. Atm I'm using that for low-refresh rate 30" screen. Though I believe LG and Dell screens do have USB-C directly.

I have one of these [0]. Goes up to 144Hz, single cable to hook up laptop to display and charge.

[0] https://www.lg.com/uk/monitors/lg-38WN95C-W

Cool. Does G-SYNC/FreeSync work with the USB-C port?

It does on my Samsung G70A with a DP-USB-C cable.

I didn't know the answer so I went to the manual [0]. Apparently it does not.

> Supported Interface: DisplayPort (G-SYNC, FreeSync), HDMI (FreeSync).

[0] https://gscs-b2c.lge.com/downloadFile?fileId=Do77Cjc9rIkTamu...

Why does the screen need USB-C support? I imagine you'd use a Thunderbolt/USBC-DisplayPort cable or similar.

For cases when you have let's say a gaming PC and a Macbook connected to the same screen. You want a USB-C port so the Macbook will get everything from a single USB-C port (power included), but you also want your gaming PC to benefit from a high performance monitor with high refresh rates on a DisplayPort/HDMI connection.

Ya agreed. I have a similar setup and would love an easy was for both to use the same screen and peripherals

Isn't this what a dock is for? Are you treating your monitor itself as the dock? I still don't see why the monitor itself needs USB-C support.

I use a Lenovo Thunderbolt dock for both my M1 16" MBP and a Lenovo laptop running Linux. It runs 2 x DisplayPort monitors, mouse, keyboard, and webcam.

yes, basically the idea is with a USB-C display the monitor can be your dock

> Isn't this what a dock is for? Are you treating your monitor itself as the dock

Yep. There are monitors with Type-C, power delivery, usb hub, so they avoid you the need of having a dock. Usually they're priced at around monitor+fancy dock, so it doesn't even cost more for more practicality.

Interesting. I think I still prefer having them separate - this way my monitor isn't obsolete as new ports are added. I only need to replace the dock.

Check out Gigabyte M28U/M32U. 4k & 144 Hz. DisplayPort over USB-C. Supports alt-mode.

I have the M32U. My only gripe is that the colors(DCI-P3 90%) are just not as good as my Macbook or my Dell U2720Q.

Otherwise, it has been great, especially with games.

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