Monday, December 27, 2010
Weak current College】 【ATX12V power supply different versions and specifications for parsing】.
<br> <br> ATX power supply from the original version of the earliest ATX1.0, accompanied by a continuous upgrade of your PC, in particular the constant renewal of PC architecture, a standard ATX power supply has also been repeatedly change and improvement .. Since 2000, in order to cope with the coming of the era of P4, ATX12V standard began. Until the end of last year, in order to adapt to the 65 nm manufacturing process of dual-core processors, the latest standard has also been .ATX12V2.2 power supply fresh out of the oven. In order to meet their own needs, buying a installations for own PC power product, we will make simple ATX power version of the story and analysis lets you purchase power products before more related knowledge. .<br> In order to comply with IntelP4 processor work environment, Intel P4 processor launched, it also launched the ATX12V power supply specifications, to replace the original ATX2.03 version. Compared with the ATX12V mainly ATX2.03 3 point changes: <br .> <br> (1) ATX12V strengthened + 12VDC-side current output capacity, on + 12V current output, surge current peaks, filter capacitor capacity, protect and make the new provisions. <br> <br> (2) ATX12V increased 4 .-core power connector for P4 processor power supply, power supply voltage of + 12V. <br> <br> (3) ATX12V strengthened + 5VSB of current output, improve the motherboard on the plug and power wake-up feature support. <br .> <br> Previous ATX2.03 power standard on + 5v, and + 3.3 has a larger consumption, and + 12 is mainly used for optical drives and hard drives. However with high performance processor and graphics card, the situation has dramatically improved, .PC system on power demand has also become thirsting. In response, Intel on ATX standard revisions, launched an ATX12V power supply standard. ATX12V and ATX2.03 differences mainly through 12V voltage regulator for CPU power supply, instead of previously provided by 5V; ATX12V ., strengthened the + 12V output capacity, and on the surge current peaks, filter capacitor capacity, protection, etc., especially for CPU and 4-pin power connector P4 processor along with the launch of the application. + 5VSB output ensures motherboard on devices .such as USB and power enabled perfection. <br> <br> Subsequent ATX12V1.2, 1.3, 2.0 have implemented: <br> <br> (1) 1.3 increased output of 12V + ability to adapt to the new INTEL Prescott CPU power .. <br> <br> (2) 1.3 power efficiency improvements: <br> <br> (3) 1.3 cancelled-5V output ports. <br> <br> (4) further strengthen + 2.0 12V output capacity, + 12V .output with two groups, divided into + 12VDC1, + 12VDC2, has a set of specially designed for CPU power supply. <br> <br> (5) 2.0 further enhance the efficiency of the power supply. <br> <br> Due .to the continuous improvement of the processor power consumption, the ATX12V power supply specifications from the launch date has been repeatedly modified, in just two years, Intel has two upgraded ATX power supply specifications. With Thom electric Monster PrescottCPU, system on 12V output current have .higher requirements, and wire limited carrying capacity, that's right for CPU power supply + 12V output current place high demands on the power supply from ATX12V1.0, ATX12V1.1, upgrading to a ATX12V1.2 ATX1.3 version. <br> < .br> ATX12V1.3 edition was mainly strengthened the 12V power supply, while increasing the SATA hard drive power connector, power conversion efficiency. Although the present power technology, + 12V single output can do better, but will cause the output wire of the major .security risk, but also will have greater line loss, Intel specifically restricts single + 12V output shall not be greater than the 240VA. In addition, ATX12V1.3 also cancelled the-5V the voltage supply. Originally-5V voltage is used for ISA slots ., but with ISA-slot eliminated,-5V voltage is on the used not long ago, so ATX12V specification has officially canceled the-5V voltage supply, so some of the more innovative power simply do not have such a voltage output. At the same .time, in the specifications, laden ATX12V1.3 when power efficiency from 68% to 70%. <br> <br> <br> <br> With the advent of PCI-E equipment system power consumption rise again, the demand to + .12VDC continues to increase. Without changes to the ATX power output specification instances, traditional ATX12V1.3 power has not adopted changes to the internal design for all your hardware needs for + 12V, so for 915/925 Series chipsets motherboards developed ATX12V2.0 specification .came into being. <br> <br> ATX12V2.0 version still is an ATX power supply specification, in essence, ATX12V2.0 specification is designed to address the extreme high CPU power consumption issues. Compared with ATX12V1.3 version, the version .most obviously ATX12V2.0 improvement is + 12V increased all the way to separate the output, using the dual output, including all the way to the + 12V (called + 12V1) specifically for the CPU power, and the other one + 12V2 power for .other devices. A computer power supply, + 12VDC output if 22A, this security is not allowed. FCC (United States Federal Communications Commission) in that regard very definite regulations, any way the computer's power supply DC voltage output is not allowedMore than 240VA, .illustrated as a way to output voltage to 40V, so this way current up to 6A 40V 240VA divided by equal, in the current reach 6A power should be entered before over-current protection status or to shut down. While Intel want + 12VDC output requirements .to 22A, which already exceeds the FCC on security requirements, you can reach + 12V × 22A = 264VA, already far outweighs the 240VA security requirements. In this case, Intel open a new standard in ATX12V2.0 will + 12VDC divided into + 12V1DC .and + 12V2DC two lines of output. + 12V1DC primary interface with the power supply (12 × 2) to the motherboard and PCIE video card power supply to meet PCIExpressX16 graphics and DDR2 memory; and + 12V2DC (2 × 2) interface designed specifically for .CPU power supply. In fact, motherboard + 12V1DC and + 12V2DC in wiring is also completely separate. Because two 12V output, main power connector 20Pin from original 24Pin output instead. <br> <br> Although many manufacturers provide older versions power plus connector .24pin motherboard go to alternative development ATX12V2.0 version, while in use on did not occur, but is only a temporary alternative, unable to completely replace genuine ATX12VV2.0 power, since this approach has the following disadvantages: first, it is impossible to .improve + 12V shortage, cannot meet the new system on the + 12V output increase of strong demand, particularly in low-watt ATX12VV1.3 previous legacy of power specifications, + 12V, in older versions of power plus 24pin motherboard go connector, just fooling .themselves. Second, the adapters will cause the voltage drop. Because the + 12V output demand, coupled with the poor design of connecting wire, will form a serious problem, affecting the power supply voltage drop. Although some new, but using different connector wiring .or special 20 or 24-pin ATX connector, it is still compatible with old specifications can, it is important that when your old power supply is damaged, you can use the old ATX12V2.0 power on the system board. <br> <br .> In addition, another important IntelATX12V2.0 version will improve the conversion efficiency is increased. The conversion efficiency is output power divided by the percentage of the input power. 1.3 power requirements, with the minimum conversion efficiency is 68%. 2.0 is the recommended .conversion efficiency to 80%. Although power factor and conversion efficiency mean power utilization, but the difference is very big. Simply put, the power factor resulting loss is the electricity sector, and the conversion efficiency of loss is the user's own account. Power factor ., EMI circuits are protected on the national grid. That is a power conversion efficiency of power supply, and the application is not 100%, and is part of the converted to heat. If V1.3 Edition power efficiency only reached 68%, ie .32% of energy is converted into heat energy. In order to prevent the accumulation of heat affects the computer up and running we need heat away, is the reason why we pretend fan. ATX12V2.0 standards in peak and normal load can reach 70% .in low load also has 60% of the proposed efficiency values can be in peak, average and low load reached 75%, 80% and 68% (the so-called General load is the load output value of the half, while the low loading .is loaded with output values of 20%). But underestimate these are converted into thermal energy power consumption to 400W power module, you can just wasted a lot of power. <br> <br> According to their own system development platform, Intel in .ATX12V2.0 specification recommended four power specifications, namely ATX12V2.0 Edition 250W, ATX12V2.0 Edition 300W, ATX12V2.0 ATX12V2.0 Edition version 350W, 400W and the four levels of power supply output to + 12VDC requires at least achieve 22A. .<br> <br> Then the actual buying process and how to identify genuine IntelATX + 12V2.0 Edition power? then we can look at the power source specification sticker labels for two-group + 12V output: motherboard connector should be a connector 24pin .; 6pinAUX has disappeared; efficiency in full and normal load must be greater than 70%; in Lt must be at least 60% efficiency. Of course, the premise is that power itself to have basic safety certification, its power supply specifications marked frightens the .reference value. <br> <br> Latest ATX12V2.2 specification still follows the 2.0 specification of dual 12V output design, just in some indicators has been further improved. Specific changes in the specification Intel also have given instructions, more focused change: increased .the latest specification of output specifications and give their load cross, strengthened 3.3V and 5V output capacity, reduced the ability of continuous power supply 12V. <br> <br> In order to meet the new needs of the large power accessories, 2.2 specification .joined the 450W output specification. In the load cross map we can see the new version of the 450W power supply, dual 12V maximum combined output power can attain 400W. Such high power output, whether they are dealing with what high-end platforms have any .problem. <br> <br> Perhaps a friend will ask, at 2.2 specification does not launch or even power still at single 12V output when manufacturers launched 450W or greater power supply, they are going to do?, in fact, Intel specification only .for the manufacturers presented a design proposal, manufacturers in the launch of products completely that you need to make adjustments. Intel specification not only considering the power output capacity will also consider the security apparatus, as specification requires a power supply single 12V outputShall not be greater .than the 240VA truth. If the manufacturer itself launch over specifications defined in the specification of the product, you cannot call it meets ATX12VXX specification. <br> <br> In the latest ATX12V2.2 specification Intel further improves power conversion efficiency. However, .by specification comparison we can see changes in Max is power time in light of the conversion efficiency, but typical load and full load circumstances change but is seldom seems to want to further improve power conversion efficiency of the present technological level is already difficult. <br .> <br> <br> <br> <br>.