Which type of CRT monitor minimizes flicker the most?

Non-interlaced CRT monitors minimize flicker the most due to the way they refresh the screen. In a non-interlaced system, the entire screen is refreshed in a single pass, meaning that all pixels are updated simultaneously. This results in a more stable image with less noticeable flickering, especially at higher refresh rates.

In contrast, interlaced monitors refresh the screen in two passes; they first refresh the odd lines and then the even lines. This method can lead to noticeable flicker because the full image is not displayed at once. Ultra-interlaced may use more complex techniques but doesn't fundamentally change the flicker issue. Digitally controlled monitors, while offering improved performance over analog systems, also may not address flicker in the same way as a non-interlaced design does. Therefore, among these options, non-interlaced is the best choice for minimizing flicker.