CGA (STANDARD) 15.7K
EGA (MEDIUM) 25k
VGA (VGA) 31.5k
The arcade industry borrowed the names cga/ega from the pc industry because they do share the same refresh rates. Arcade monitors are fully analog, while the pc counterparts were digital (cga 16 colors, ega 64)
Extendend range cga monitors exist that do larger ranges around 15k
(Example is the current 19" Vision Pro from happs Scanning Frequency: Nominal(15-17.5KHz))
Most modern med resolution monitors will do cga/ega
A few vga monitors will do all 3. (d9200/the betson/the bilabs multisync models)
Later,
dabone