I have tried everything, I can't get 144hz at 4K. I can get 120 with a lower resolution and low quality only. I can't find a single post that explains what I'm doing wrong.
HDMI cable from MacBook Pro to Asus ROG Strix XG27U
To use on a modern Mac, you need to be using an "ULTRA" certified HDMI cable, not a generic one one that shipped in the box with a product.
M2 and better Macs with a DIRECT HDMI port CAN support higher refresh rates for 4K at 60Hz, but watch for transmission errors. if any occur, the refresh rate, and then the resolution, are reduced until the display is error-free.
HDMI cables you want for HDMI-only Displays (higher resolutions than 720p TV sets) are marked as Certified with an anti-counterfeiting tag and are labeled:
"Premium High Speed HDMI cable" or that + "with Ethernet" --OR--
"Ultra High Speed HDMI cable" or that + "48G"
Cables with No Certification tags are good for your standard 720p TV set, and not much more.
HDMI was invented for HD TV sets. it works great at its original resolution of 720i or 720p. At higher resolutions, it quickly develops issues that are complex to solve, and the cables and adapters required to solve are NOT intuitive.
To use on a modern Mac, you need to be using an "ULTRA" certified HDMI cable, not a generic one one that shipped in the box with a product.
M2 and better Macs with a DIRECT HDMI port CAN support higher refresh rates for 4K at 60Hz, but watch for transmission errors. if any occur, the refresh rate, and then the resolution, are reduced until the display is error-free.
HDMI cables you want for HDMI-only Displays (higher resolutions than 720p TV sets) are marked as Certified with an anti-counterfeiting tag and are labeled:
"Premium High Speed HDMI cable" or that + "with Ethernet" --OR--
"Ultra High Speed HDMI cable" or that + "48G"
Cables with No Certification tags are good for your standard 720p TV set, and not much more.
HDMI was invented for HD TV sets. it works great at its original resolution of 720i or 720p. At higher resolutions, it quickly develops issues that are complex to solve, and the cables and adapters required to solve are NOT intuitive.
Solved. Monitor hdmi version is 2.0 and MacBook is 2.1 or 2.2. Need new monitor. Thanks for helping Grant.
HDMI 2.0 is good for up to 4K at 60 Hz. it uses a data stream about 14.4 G bits/sec, too fast for the 10 G Bits/sec USB-3.1 ports on certain Macs.
Ok, I had just bought an Ultra certified cable for something else and just tried it with the same result. 4k @ 60hz. Not sure what to try next? This cable came directly from Samsung.
Do I need to reboot after I plug in the new cable?
Let me try that, thank you
Just for testing I purchased another cable that includes the certification hologram. Still no change, 4k @ 60hz, or 2560x1440 low res @120hz. This is frustrating.
Exactly what model MacBook Pro is this, by model-year, and what processor {plain, PRO, MAX} ??
Yep, my right monitor was 60 and my left was 2.1 at 120. Now to sell them and buy a new one :)
I can't get better than 60hz 4k external monitor with m2 max
