As of 2022, the ATX design still remains the de facto standard for personal computers.ĪTX I/O plates for motherboard rear connectors While some manufacturers adopted the new standard, Intel discontinued any future development of BTX in 2006. In 2004, Intel announced the BTX (Balanced Technology eXtended) standard, intended as a replacement for ATX. While some dual CPU socket motherboards have been implemented in ATX, the extra size of EATX makes it the typical form factor for dual socket systems, and with sockets that support four or eight memory channels, for single socket systems with a large number of memory slots. EATX (Extended ATX) is a bigger version of the ATX motherboard with 12 × 13 in (305 × 330 mm) dimensions. The most recent ATX12V power supply unit specification is 2.53, released in June 2020. The most recent ATX motherboard specification is version 2.2. The ATX specifications were released by Intel in 1995 and have been revised numerous times since. Dimensions of a full-size ATX board are 12 × 9.6 in (305 × 244 mm), which allows many ATX chassis to accept microATX boards. Other standards for smaller boards (including microATX, FlexATX, nano-ITX, and mini-ITX) usually keep the basic rear layout but reduce the size of the board and the number of expansion slots. 4.5 Specification changes and additionsĪTX is the most common motherboard design.4.2.2 Power connection to the motherboard.4.2 Main changes from AT and LPX designs.
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