Super eXtended Graphics Array is an abbreviation referring to a standard monitor resolution of 1280 x 1024 pixels. This resolution of 1,310,720 pixels is an enhancement of the standard XGA resolution that IBM developed in 1990.
This resolution is a very strange resolution as it is not the standard 4:3 ratio but a 5:4 ratio. A standard 4:3 monitor using this resolution will therefore not have square pixels, but rectangular ones. This is especially a problem with LCD monitors which have a fixed resolution.
A resolution of 1280 x 960 is also often supported, which has the standard 4:3 ratio.
See also: Computer display standard