>>8
Lol, what? CRT's don't have a "horizontal resolution" other than the dot pitch and maximum bandwidth limit. They have a flexible vertical resolution (then again, limited by the dot pitch) within a range, which is limited by the max/min horizontal frequency, which in turns gives how many frames a second can you draw, which are also limited (but quite openly) by the max/min vertical frequency.
In your average low-end 17" CRT (69 K max hfreq), the following modes are (examples of what's) possible, and they all look sharp: 800x600, 1024x768, 1280x960, 1280x1024, 1400x1050, 1500x1120, 2048x1024, 2048x1120, ...