Nope! 720x400 72hz was extremely common for games and apps. It's also why a lot of cheap Point of Sale LCD monitors around the turn of the millennium had 75Hz panels

Or if they were "high resolution" 800x600 56hz

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Narishma 3 days ago | parent | next [-]

Can you point to some source for that? I've never heard of a game using that resolution. The vast majority of them used the standard 320x200, either in CGA, EGA or VGA. The first two ran at 60Hz, VGA at 70Hz. A few games in the mid to late 90s started to use some non-standard tweaked VGA modes but by then Windows 95 started taking over gaming. You can check Wikipedia or Mobygames if you don't believe me.

	▲	kristianp 3 days ago \| parent [-]
		Apparently the 720x400 mode is a text mode, according to: https://retrocomputing.stackexchange.com/questions/14806/why... I would agree it's not a mode that was commonly used for vga dos games, which used lower resolutions around 300x200 and 8 bit color.

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maximilianburke 3 days ago | parent | prev [-]

Narishma is right, mode 13h is 320x200 @ 70hz.