The computer power supply is the hub of power supply for various components of the computer and an important component of the computer. Convert 220V AC power into DC power and deliver it to each component separately.

The ATX Power Supply ATX Specification is a new motherboard structure standard developed by Intel in 1995. It is an abbreviation for ATExtend, which can be translated as the AT Extension Standard. ATX power supplies are designed based on this specification. Currently, household computer power supplies sold on the market generally follow ATX specifications. The BTX power supply is a pC power supply designed in accordance with the BTX standard. However, the BTX power supply is compatible with ATX technology, and its working principle and internal structure are basically the same. The output standard is the same as the current ATX12V2.0 specification, and it also uses a 24 pin connector like the ATX12V2.0 specification. The BTX power supply mainly derives several power supply specifications from the original ATX specifications, including ATX12V, CFX12V, and LFX12V. Among them, ATX12V is an existing specification, and the reason for this is that the ATX12V2.0 version power supply can be directly used for standard BTX chassis. CFX12V is suitable for chassis with a total system capacity of 10-15 liters; Although this power supply has not undergone any technological changes compared to previous ones, it has adopted an irregular shape to meet size requirements. At present, there are three specifications defined: 220W, 240W, and 275W, among which the 275W power supply adopts independent dual+12V output. LFX12V is suitable for chassis with a system capacity of 6-9 liters, and currently has two specifications: 180W and 200W. BTX is not an innovative power standard, although INTEL company vigorously promotes it, it is rarely mentioned now because there are too few supported manufacturers.