adding support for Gigabyte M28U with MBP 16 2019

[jacobhmurphy]

[tonsky]

Thanks!

[jakebellacera]

@jacobhmurphy just curious, how are you connected to the monitor? I see Thunderbolt/DisplayPort but it's not clear to me if you're connected via USB-C or DisplayPort. If you could let me know exactly which cable you have connected as well that would be helpful. I just picked up my M28U and appear to have ran into snags with my 2019 16" MacBook Pro which has a 5300M (basically the step down from your model). Thanks!

[jacobhmurphy]

@jacobhmurphy just curious, how are you connected to the monitor? I see Thunderbolt/DisplayPort but it's not clear to me if you're connected via USB-C or DisplayPort. If you could let me know exactly which cable you have connected as well that would be helpful. I just picked up my M28U and appear to have ran into snags with my 2019 16" MacBook Pro which has a 5300M (basically the step down from your model). Thanks!

I'm using this Cable Matters USB-C to DisplayPort cable. It's currently connected via a CalDigit TS3 Plus dock through the Thunderbolt port on the dock. Perhaps Monterey may show the 120 Hz mode through the Displays preference pane since it supports variable-refresh rate, but if you're on Big Sur it might be helpful to install SwitchResX as Big Sur might not offer 120 Hz HiDPI via the Displays preference pane.

[AgapovOne]

@tonsky I think it would be great to add which cable also provided support for any resolution. Like 5K@120hz only with Thunderbolt-DisplayPort, not any HDMI setup. It would help to choose proper expensive cable that I should buy with a monitor.

[tonsky]

I am pretty sure it was in the article: 4k@120Hz+ only works via DisplayPort. The particular cable doesn’t matter

[MainasuK]

I use the similar setup:
MacBook Pro 14 inch --(thunderbolt)--> CalDigit TS3+
CalDigit TS3+ thunderbolt port --(Type-C-to-DisplayProt 1.4)--> LG 27GP950-B (4K 120Hz without DSC or 4K 95Hz with DSC)
CalDigit TS3+ DisplayPort (1.2) --(DisplayPort 1.4)--> LG 27UL650-W (4K 60Hz)

I think the dock bandwidth is almost drain out because the dock cannot output 144Hz but 95Hz via DP 1.4 with DSC. Only the directly connect make 4K 144Hz works.