via HDMI port mac side and DVI port monitor by HDMI/DVI cable
Contrast scale matches exactly (ex. 84 on BrightnessMenulet and 84 in osd menu)
Brightness scan not matches (ex. 30 on BrightnessMenulet is 100 (max) in osd menu) than value upper of 30 is too bright. However the instrument remains fully useful.
Tested with