We have different scenarios for motherboard applications, and generally have different requirements and specifications for the size of the motherboard, common embedded motherboards can be divided into ATX, M-ATX, ITX, Thin-ITX, some for special application scenarios, there are also PICO-ITX, 3.5-inch, Special Gauge, SDM, and so on, the following are some of the introductions:
1, ATX ( Advanced Technology Extended) motherboards:
ATX is a motherboard specification developed by Intel in 1995, and is the first major change in computer chassis and motherboard design in many years.ATX motherboards can be interpreted as full-size motherboards, and are the most common type of motherboards, which are usually larger, support multiple expansion slots, and provide a wealth of rear ports, the distinguishing feature is that the memory is mostly 4 slots, and the slots underneath are usually 7 expansion slots, but take up 8 expansion slot positions (nowadays, it is also usually 4 PCI-E full-length slots + 2 PCI-E 1× slots, or m.2 slots). Applied to consumer desktop motherboards, large board design, good expandability.
2, Micro-ATX motherboards:
Micro-ATX motherboards are a bit smaller than ATX motherboards, which is a scaled-down version of ATX, and usually have fewer expansion slots and interfaces. Memory is also typically 4 slots, and expansion PCI-E slots are typically only 4 slots occupying 5 spaces. The most common specification in the size version of a kind, their width will not change are 244mm. commonly used in consumer desktop motherboards, the price is better than the ATX large board.
3, ITX motherboards:
It is designed specifically for small computers motherboard specifications, size 170mm × 170mm, including a full-size PCI-E slot, you can install discrete graphics cards, because the size of the motherboard becomes smaller chassis also becomes smaller, because of its small size and many users like, by a variety of manufacturers are widely used in a variety of commercial and industrial applications, commonly used in embedded small case products. Commonly used in embedded small chassis products.
4, Thin-ITX motherboards:
In fact, it is the same size as the ITX, but the difference is in the I/O interface part, the height of the hard limit is not allowed to exceed 25mm, which is in order to plug into the smaller chassis, in addition to the Thin-ITX basically the use of laptop memory, cancel the PCI-E slots of the motherboard products, less scalable, applied to the small chassis products, such as miniature case, such as miniature case. In the small chassis products, such as mini computer, all-in-one computer.
5, Pico-ITX motherboards:
Pico-ITX specification was first released by ICMG in 2007. Pico-ITX motherboards are 100 x 72mm in size, and are used for special embedded products, such as drones, robots, smart homes, in-vehicle equipment, and medical instruments and devices.
6, 3.5-inch ARM motherboard:
The size of the motherboard is 146mm x 102mm, which should be mainly used for standard embedded motherboards in the commercial display market, and is mainly used in floor-standing and wall-mounted All-in-One PCs, touchscreen All-in-One PCs, advertisement machines, digital signage and other products.