What is PC power

Computer power supply is the hub of computer components, is an important part of the computer. The 220V alternating current is converted into DC power and transported to each component separately.

Power classification

3.1 Pc/xt power supply

IBM first launched a personal PC/XT machine set standards.

3.2 at power supply

It was also the standard proposed by IBM early launch of Pc/at, which was able to provide 192W power supply.

3.3 ATX power supply

The ATX specification is an industry standard that Intel Corporation introduced in 1995, and today, the ATX Architecture power supply is known as the industry's mainstream standard. ATX is an abbreviation of the English at extend, which can be translated to the "at extension" standard, and ATX power supply is designed according to this specification. The current sales of household computer power, generally follow the ATX specification. The standard size is 150x140x86mm.

3.4 BTX Power

The BTX (Balanced Technology eXtended) power supply is a PC power that is also designed to comply with BTX standards. It is understood to be an alternative to Intel's convenience in making manufacturers of branded machines. BTX Power is compatible with ATX technology, and its working principle is the same as that of ATX, the output standard is the same as the current ATX12V 2.0 specification, power output requirements, interfaces, etc. support ATX12V, sfx12v, cfx12v and lfx12v. This kind of power supply has not changed with the previous power supply, but in order to meet the requirements of the size, the irregular shape is adopted. Currently defines the 220W, 240W, 275W three kinds of specifications, of which 275W power supply using independent two-way +12v output. BTX is not an innovative power standard relative to ATX.

3.5 EPS power supply

EPS power supply and Emergency power supply system (UPS) are completely different concepts. Beginning in the 2002, with the development of the digital age, there were SSI EPS standards for the new Working Group (WorkStation) and server chassis. ATX Power supply Standard ATX2.03 The motherboard power supply is a 20pin,cpu power supply of 4pin. And the characteristics of EPS is the motherboard power supply 24PIN,CPU power 8pin. So now often see the motherboard power supply for the 20+4PIN,CPU power for 4+4pin ATX Power is actually an ATX power extension, the correct name should be "Atx/eps."

Now the popular home motherboard CPU power often has a 8pin interface, the normal ATX power supply 4pin can fully meet its power consumption (left 4pin). The ATX power supply will have a 8pin interface. This is because Intel's Xeon series CPU is required to have 8pin power supply-The current normal CPU consumption has reached 70W above, so that the server dual CPU will be more than 140W, with 12V conversion is more than the 12A above the current , 4pin of four thin lines are clearly not stable to the motherboard power supply, and this can also create a security risk. ATX 20pin is the same reason, considering to further development, the motherboard manufacturers in the ordinary home motherboard first launched 24pin motherboard, and then ATX on the single CPU also appeared 8pin interface, fully compatible with the EPS standard. It is also perfectly possible for such motherboards to use standard ATX power supplies, but for security reasons it is best to connect all the lines.

3.6 Wtx Power supply

The WTX power supply (workstations TX) is the workstation power supply, between the server and the home computer, and can also be understood as a strengthened version of the ATX power supply. The criteria presented at that time as a result of the advent of PENTIUMIII Xeon (Slot2). Larger in size than ATX, power supply is also stronger than ATX power, often used for servers and large computers. The WTX power supply is one of the architectures for the IA server power supply.

3.7 SFX, CFX, Lfx power supply

SFX power supply, CFX power supply, LFX power supply, as well as WTX power supply, can be said to be ATX variant, both in size, power have their own specifications, are as compatible with BTX Power now ATX Series Motherboard. These power supplies are in order to adapt to the current minicomputer has no independent graphics, small size of the characteristics of the standard, to facilitate the personal assembly of computers to buy different chassis and other accessories. The cfx12v is suitable for the system's total capacity in the 10~15-liter chassis, while the LFX12V is suitable for the system capacity 6~9-liter chassis, currently has 180W and 200W specifications of two; SFX power supply Size 125x100x63.5mm.

Power Connection Cable

For different positioning of the power supply, the number of its output conductor is different, but can not be separated from the colorful 9 kinds of colors: yellow, red, orange, purple, blue, white, gray, green, black. A healthy PC power supply has these 9 colors of the wire (currently the mainstream power is omitted white line).

Yellow: +12v (Standard range: +11.40-+12.60)

Blue: -12v (Standard range: -10.80--13.20)

Red: +5v (Standard range: +4.75-+5.25)

White: -5v (Standard range: -4.50--5.50)

Orange: +3.3v (Standard range: +3.14-+3.45)

Green: p-on (power switch End)

Gray: P.G Signal Line