Help with 271QRX

Windows won't allow me to click HDR in system> display, when I do it automatically switches back. Bit depth is only coming up at 6 bit.

I've downloaded and installed the driver from MSI. I've updated the monitor firmware using Gaming Intelligence app.

If I select 360hz, display resolution changes to 1920x1080.

When I change the resolution to 2560x1440, the refresh rate changes to 60hz.

360hz isn't coming up as an option in NVIDIA.

If I create a manual resolution of 1440p @ 360hz | get a black screen.

I'm using the DP cable that was supplied with the monitor.

Any ideas?