Additional 4 Pin Atx Power Connector
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Compatibility issues for ATX power supplies and motherboards
When ATX was originally introduced in that location was just ane kind of ATX ability supply. If you had an ATX power supply and an ATX motherboard then you lot plugged them together and they worked. At least they did if the power supply delivered enough wattage. Back then ATX life was simple. Nowadays things are a bit more complicated. At present you can get an ATX power supply and ATX motherboard and end upwardly with connectors which don't match. Even if the connectors do match y'all can still run across trouble even though the power supply appears to take sufficient wattage. This page introduces you to the issues you need to consider to maximize the chance that an ATX power supply and motherboard will work together properly. The information below is just a summary. The greenish links provide more detailed information on the field of study.
The motherboard main power cables
The ATX standard has 2 different versions of the main power cablevision: the original 20 pin cable , and the the newer 24 pin cable . The 24 pin cable is only the 20 pin cable with 4 extra wires added to the end to provide extra current. If your power supply main power cable and motherboard primary power connector both take the same number of pins so they'll (of course) fit together just fine. Just what happens if they don't match? If you plug a 24 pin power cable into a 20 pin motherboard then it volition work fine but y'all often can't become them to physically fit together because something gets in the mode. If they don't fit together and so you can go an adapter cable which converts a 24 pivot ability cable into a 20 pin cable. Yous tin can always plug a twenty pin power cable into a 24 pin motherboard but whether information technology works over the long booty depends on how much current your motherboard draws. Those extra 4 pins provide more electric current carrying capacity. Plugging a twenty pin cablevision into a 24 pin motherboard can strain the xx pins that you lot're using. If the motherboard draws too much electric current then information technology will overheat the connector which tin can burn or melt it. There are adapters which convert 20 pin cables into 24 pin cables but they don't solve the problem and tin can cause issues of their own. Many newer power supplies come up with a xx+4 ability cable which has a 24 pin connector which can be split up into two pieces: a 20 pin piece, and a 4 pivot piece. This kind of power cablevision is fully compatible with both 20 and 24 pivot motherboards. If yous're buying a new power supply then try to become one with a twenty+iv power cable.
The 12V CPU power cables
CPUs used to be powered by the 20 pin main power cable. Nigh all current motherboards ability their CPU with a 12 volt CPU power cable. There are two kinds: the 4 pin 12V cable and the viii pin 12V cablevision . The 4 pin cablevision is often chosen a P4 cable (although it'south a very bad name) and the viii pin cable is called an EPS12V cable. Y'all must plug a cablevision into this motherboard connector or the CPU volition receive no power. The compatibility rules between 4 and 8 pivot connectors have a lot in common with the rules for 20 and 24 pin connectors. The best choice is to plug a 4 pin cable into a 4 pin connector, an 8 pin cable into an eight pin connector, or a four+4 cable into either kind of connector. You tin can get adapters which volition convert diverse kinds of power supply cables into both 4 pin and viii pin 12V cables. You can plug a 4 pin 12V cable into an 8 pivot motherboard and it volition sometimes work properly but other times it won't work at all or will burn/cook the connector. Equally with plugging a 24 pin cable into a 20 pin motherboard connector, you tin can plug an eight pivot cable into a 4 pin connector and leave iv pins hanging over the terminate merely you tin too take the same problems with things preventing information technology from fitting. It will work fine if information technology fits. If you're buying a new power supply and so the safest choice for the long haul is to get 1 with a iv+4 power cable considering information technology's uniform with both 4 and 8 pin connectors.
The aux power cablevision
A cable yous're non likely to run into is the 6 pin aux connector . Some older AMD dual CPU motherboards accept them. If the motherboard requires this connector then y'all have to get a power supply which provides one. Most current power supplies don't accept aux cables and aux cable adapters manifestly don't exist (unless y'all're good with a soldering iron and can build your own).
Where's most of the load? 3.three/v volts or 12 volts?
How a calculator uses ability has gone through a lot of changes over the years . Older machines used to consume nearly of their power from the three.3/v volt track. Since the Athlon 64 and Pentium 4, computers have consumed most of their power from the 12 volt rail. Older power supplies provided the majority of their wattage on the three.3/v volt track and new supplies deliver it on the 12 volt track. As a upshot, yous need to be careful when plugging an former power supply into a new computer or a new supply into an old computer . If you know that the ability supply won't exist used in an older computer then you can apply an ATX12V 2.0 or newer ability supply which delivers the bulk of its power on the 12 volt rail and not much power (less than 150 watts) on the 3.3/5 volt rail. If you need a ability supply for an older computer and so you can use an ATX12V 1.iii or before ability supply which provides most of its power on 3.3/v. There are besides many newer ATX12V 2.0 or newer power supplies which provide enough wattage on 12 volts for newer computers besides equally enough wattage on 3.3/5 for older computers. Those are the best supplies because they provide enough wattage for all kinds of machines.
Obscure considerations
If yous're easily worried then you might want to skip this paragraph. Near of the things mentioned here are either more detail than yous demand to know or problems which rarely crop upwardly. But these issues are listed for the thorough types out there (you know who you are). If y'all've been researching power supplies so you've probably noticed that newer ones usually come with dual 12 volt rails. Sometimes they have three or even four 12 volt rails. This subject of multiple 12 volt rails is more complicated and so y'all may think . And if y'all have a multiple 12 volt rail power supply in a very high-powered computer and then you may have to bargain with rail balancing problems . You can accept cross loading problems with some power supplies if y'all draw unbalanced amounts of wattage from the 3.3/5 volt and 12 volt rails. You can even go into problem if you describe too little wattage .
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Source: http://www.playtool.com/pages/psucompat/compat.html
Posted by: johnsoncontly.blogspot.com
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