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It’s decently sized, sturdy enough to store random accessories from the rest of the build, and most importantly, I can keep any unused modular cables in a box clearly marked with the power supply they belong to.Įven just putting the PSU manual and cables in a one-gallon Zip-Loc bag is an improvement over tossing them in a random drawer or box. ![]() When doing a new build, I usually don’t keep all the boxes for all the components, but I keep the PSU box. When buying a new power supply, clearly label the cables you have. You save yourself a huge potential headache by spending just five extra minutes fussing with your cable management and swapping cables. Use the new cables that came with the new power supply. In fact, whenever it’s an option, you should – no further reading required. The easiest way to avoid problems is to simply take the time to replace the power cables when replacing the power supply. #4 pin molex connector on motherboard how toIf reading the previous section makes you a little nervous, here’s how to avoid a cross-wire situation altogether, whether you’re looking to prevent it from happening in the future or to deal with a mess you have right now. How to Avoid the Modular Power Cable Disaster This is exactly why you will often find warnings printed directly on the back of the power supply with text such as “Do not use modular cables from other power supplies” or “Intended for use only with genuine Corsair Type 4 cable sets”. A particular component may turn on because it’s hot but operate erratically because it’s under-volted.Īnd in the worst case, you start your computer with the swapped pin configuration and fry one or more of your components. This can be especially frustrating because it’s the start of a long troubleshooting process where the cause of your problem isn’t immediately apparent. In the worst, but not catastrophic, scenario, the computer simply fails to start or operate as expected, but there is no permanent damage. Ideally, the pinouts of the modular cables from your old PSU and new PSU will match, and everything will work just fine. If you simply unplug the PSU side of the PSU cables (while leaving them attached to your motherboard, GPU, and other components) and insert the new PSU, you can effectively “scramble” the pinout diagram by sending 12v of power to a pin that the hardware expects 5v or power over the wire to a pin that the motherboard expects to be ground, and so on.Įvery 24-pin ATX power cable will have three +12v pins and one -12v pin, for example, but depending on the manufacturer, these pins can be anywhere in the connector’s 2×12 pin grid. This modular cable warning is there for a reason. What exactly does this mean, and why is it problematic? This means that the modular cables that come with a PSU are “pinned” to match that PSU’s pinout and not all modular power supply. Surprisingly, however, the pinouts aren’t standardized on modular PSUs except to whatever internal standard the manufacturer chooses to use, and without testing the pins you’d never know.Īlthough a particular +5v pin is always in the same location on a standard ATX power supply motherboard connector – known as the “peripheral side” of the cable – it may not be in the same location. ![]() If you’ve ever seen a schematic of any type of socket that labels the individual pins, sockets, or contacts as “+5V” or “GND,” you’re looking at a pinout diagram telling you which part of the connector does what. The way the individual wires are arranged in the cable and connector is called “pinout”. Fan headers, Molex drive connectors, 24-pin Molex header for motherboard power connections, etc. #4 pin molex connector on motherboard PcMany cables inside your PC are standardized. Many PSUs come with modular cables, and it would be easy to reuse your old cables when replacing your PSU, right? Except it can fry your build. ![]()
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