Freesync or not?
I don’t think so.
Tested: CAC-1336, Radeon RX 580, Acer XV273K.
Windows 10: Freesync can be enabled from direct DisplayPort connection but not from HDMI 2.0 port and CAC-1336.
macOS 12.4: I think a newer GPU is require for VRR.
At least HDR works.
I don’t have a GPU with a HDMI 2.1 port.
Maybe someone could test with xbox and cac-1335
I tested this myself! The cac-1335 does have some edid problem with xbox. It only reaches 1080p120hz without vrr.
So i bought a Dr. HDMI 8k for testing and it really solves the edid problems.
The cac-1335 was able to deliver 1440p120hz without vrr.
But apparently 1440p120hz with vrr works now over hdmi2.0 after playing around with the edid profiles. Seems like i don’t need the adapter anymore for xbox.
To be clear, my CAC-1336 test with Radeon RX 580 should not count as a success with that setup (for non-VRR functionality). I only used that setup since it supported VRR from DisplayPort. See my thread CAC-1336 operation for more testing results.