man 55 slot

Guide to Graphics Card Slot Types. Difference between single slot, dual-slot, 2.2 slot, 2.3 slot, 2.5 slot, 2.75 slot, and triple slot graphics cards. The height of a graphics card is generally expressed in terms of slot number i.e. single, dual, 2.5, 2.7, triple. This number specifies the number of slots a graphics card will occupy on a motherboard and probably on the computer case expansion ... sts slot