Yeah basically you can only signal “on-off” so many times a second in a vga cable before the ons and offs get blurry and unusable. So you can trade higher resolution for lower frame rate (or the reverse, like here) as long as you keep the total number of on-offs below the limits.
Ah. I see, so reducing the resolution was more about sending frames to the monitor faster, not about optimizing the tube hardware’s behaviour
Yeah basically you can only signal “on-off” so many times a second in a vga cable before the ons and offs get blurry and unusable. So you can trade higher resolution for lower frame rate (or the reverse, like here) as long as you keep the total number of on-offs below the limits.