M1/M2/M3 Macs have limited HDMI 2.0 bandwidth (only 3840x1080 @ 60Hz). You must use a USB-C to DisplayPort 1.4 cable to achieve full 5120x1440 @ 120Hz.
To update your Samsung CRG9 driver, follow these steps: samsung crg9 driver
| Component | What It Is | Why You Need It | | :--- | :--- | :--- | | | A text file telling Windows the monitor’s capabilities (max res, refresh rates, timings). | Allows Windows to show "Samsung C49RG90" instead of "Generic Monitor." Prevents resolution glitches. | | Firmware | The software that runs inside the monitor’s hardware. | Fixes bugs (e.g., flickering, PbP issues). Requires a USB drive to install. | | Easy Setting Box | Samsung’s software utility. | Splits the 49" screen into predefined zones for multitasking. | M1/M2/M3 Macs have limited HDMI 2
: Version 1.0 (released May 2019) is the primary driver for Windows 7 through Windows 10/11. Easy Setting Box | Allows Windows to show "Samsung C49RG90" instead