Something I have wondered for a while is why did some early socket 7 motherboards have official support for the following
FSBs

40mhz (m567/69 have it)
45mhz
55mhz
62mhz
68mhz (62&68 listed as turbo freq)
80mhz (on a board with no 75mhz setting)
90mhz (m590 “super 7” board w/ 4.2vio)

All of these seem rather pointless and I’m not sure what some were even for.

Any ideas what people would have used these speeds for?