The most common options are ATX, Micro-ATX, and Mini-ITX. There’s also XL-ATX and E-ATX, which are slightly larger than ATX but are rarely used in gaming PCs. Large cases often also support ...

Numerous variations of the ATX were subsequently introduced with both smaller and larger form factors, including the microATX, Mini ATX, FlexATX and Extended ATX (see PC motherboards). THIS ...