We used the following calibration settings to review the Vizio M8 Series Quantum 2020 (M65Q8-H1), and we expect our settings to be valid for the 55" (M55Q8-H1) model as well.
For SDR content, we recommend choosing the 'Calibrated Dark' picture mode, as it's the most accurate one out of the box, and allows for the most customization. We recommend leaving the Contrast to '50', Color at '50', Tint at '0', and Sharpness at '0'. We selected the 'Warm' Color Temperature, as it's closest to our calibration target of 6500K. If you prefer a warmer or cooler image, you should adjust this setting to your preference.
You should adjust the Backlight to your specific viewing conditions. Changing the backlight does not have any impact on the overall picture quality. The Brightness setting adjusts the image itself, and we don't recommend changing it.
Under the 'Advanced Picture' tab, the Active Full Array setting controls the M8 Series Quantum 2020's local dimming feature. The peak brightness of the TV varies depending on this setting. We recommend using the 'High' setting. We recommend setting the Gamma to '2.2'.
HDR is automatically enabled for the native apps. When you start playing HDR content, the picture settings menu changes to specify the HDR format. Once you start playing HDR content, some of the settings change automatically. We recommend choosing the 'Calibrated Dark' Picture Mode, and leaving the other settings to their defaults in HDR.
Unlike the Vizio M Series Quantum 2019, there's no longer a Full UHD Color setting to enable full bandwidth. The Full Color 4:4:4 setting doesn't seem to be working at this time, so we recommend setting the Color Space Range to 'RGB'.
The Vizio M8 Series Quantum 2020 supports Dolby Vision, from native apps and with most external devices. As with normal HDR content, when you start playing Dolby Vision content, some settings change automatically. We recommend leaving these settings as-is, do not copy our SDR settings over.
If you find HDR content too dim, you can make it brighter by setting the Picture Mode to 'Calibrated Dark', Active Full-Array to 'High', Gamma to '1.8', Color Temperature to 'Normal', and Local Contrast to 'High'. These settings result in a much brighter image, as you can see in the EOTF curve.
Although we disable most motion enhancing functions for most of our tests, you should adjust these to whatever looks best for you.
The M8 Series Quantum 2020 has a Black Frame Insertion feature to improve motion clarity. To use it, enable Clear Action.
The M8 Series Quantum 2020 can only remove judder from true 24p sources and native apps. To do so, enable Film Mode.
From the base SDR and HDR settings, simply enable the Game Low Latency setting from the ProGaming Engine menu. Unlike most other TVs, this setting can be enabled with any picture mode. For signals that require full bandwidth, Vizio has removed the Full UHD Color setting, so there's nothing to change.
The M8 Series Quantum 2020 supports variable refresh rate to reduce screen tearing when gaming. To use VRR, set Game Low Latency and Variable Refresh Rate to 'On'. Note that VRR doesn't work at the time of writing and will most likely be fixed in a future firmware update.
Unlike TVs from most other brands, no special settings are required for PC use on the M8 Series Quantum 2020, you only need to turn on Game Low Latency to get low input lag. Vizio has removed the 'Computer' Picture Mode, and the Full UHD Color setting. At this time, there are issues with the Full Color 4:4:4 option for chroma subsampling, and looks significantly worse than RGB, so we recommend sticking to RGB until an update fixes these issues. The RGB option allows for a proper chroma 4:4:4 signal.
The following are the results of the white balance and colorspace calibration on our unit. They are provided for reference, and should not be copied as the calibration values vary per individual unit even for the same model and same size as the TV we reviewed due to manufacturing tolerances. If you want to try them you will need to enter all values shown, as all of them are active at the same time. If you end up with worse picture quality, simply reset them to the default values.