Power supplies (ATX)

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Power supply (ATX) – what to focus on when buying 

Computer power supply – what it is 

We call the power supply the heart of every PC. At first glance, it’s just a little box installed on the inside of a computer’s chassis, with a little socket on the outside for a power cable. On the inside, bundles of wires come out of it to various components of the computer (including the processor, graphics card, and hard drives). The purpose of this device is to convert alternating current from a power outlet into a direct current that is necessary for computers to function properly. 

Types of power supply 

When choosing the power supply, it’s good to start by determining what unit suits your needs best – a less powerful computer demands much less power than, for instance, a dedicated high-end gaming rig. Start by adding the power requirements of all components together, with a little extra margin on top of that. 

Equally important is the power supply’s configuration. You can choose equipment in various sizes: 

  • ATX power supply – the most universal and at the same time largest compared to the models described below. Their size is most often 87×140×150 mm. 
  • SFX power supply – slightly smaller from the ATX standard models (63.5×100×125 mm). SFX power supply units also come in the SFX-L standard whose length is 120 mm, which makes it possible to install a slightly larger fan. 
  • TFX power supply – the smallest units on our list. Their size is most commonly 65×85×175 mm, so they can easily fit into even small chassis. 

Computer power supply – essential information 

Before buying a power supply for your computer it’s good to learn about the main technological considerations. Understanding those will certainly make it easier for you to pick a suitable model that will serve you for a long time. The most important power supply parameters have been compiled in the list below. 

  • Power rating – this parameter indicates the maximum power that the unit is capable of supplying to components. ENDORFY offers models with power levels of 500W, 600W, 700W, 750W, 850W, and even 1000W. 
  • Energy efficiency certificate – the principle is simple – the higher energy efficiency of a unit, the less energy it wastes. This parameter is indicated by proper certificates, including 80 PLUS® Gold (issued to all our Supremo series units) and 80 PLUS® Bronze (obtained by all ENDORFY power supply units from the Vero series). 
  • Protections – their purpose is to prevent any kind of damage, including overheating. Information on protections is included most often in the technical specification of the unit. 

See all (ATX) POWER SUPPLY units from ENDORFY 


How do I pick the power supply unit for my computer?

Purchasing power supply is something that many PC assembly enthusiasts leave for last when gathering components. That makes sense – the power needed depends on the sum of energy requirements of all combined components within the chassis (and ideally, it should be slightly larger). But, of course, that is not the only parameter that you should pay attention to before you buy the power supply. 

Just as important is the size of the unit itself. It should be selected in such a way that the device easily fits within the computer’s chassis while leaving enough empty space for other components. You can choose from ATX units (about 87×140×150 mm), SFX units (roughly 63.5×100×125 mm) and TFX units (with sizes around 65×85×175 mm). 

Before buying, check the efficiency certificate as well – the so-called 80 PLUS® – which will tell you the unit’s performance and specify what percentage of energy drawn from the power grid will be supplied to the computer. ENDORFY power supply units have 80 PLUS® Bronze and 80 PLUS® Gold certificates. 

How do I connect the power supply to my computer?

It may not seem that way, but power supply replacement is a relatively simple task. Just follow the steps we’ve described in the list below. They’ll make installation a breeze and will not take that long – we’ve checked. 

  • Prepare the computer – turn it off, unplug it and place it on a protected surface (such as a desktop). 
  • Open the case – if needed (for example, if installation requires it), remove the internal components. 
  • Unbox the power supply – make sure all end caps have been removed and place the unit in the proper spot of the chassis. Secure the unit within the frame with screws. 
  • Connect the unit to components and organize the cables in the chassis – most plugs are designed so that they fit only the correct slots. 
  • Close the chassis – after you’ve done this, you may plug the power cable into a socket and turn on the computer. 

How do I check my PC’s power supply?

If your computer turns itself off, makes worrying noises or heats up rapidly, the most likely culprit is a damaged power supply unit. In order to check the source of the problem, you should remove the device and visit a tech supply center. This is the safest way to learn your power supply unit’s condition. 

However, if you’d rather save some time, you might use various diagnostic software that can immediately test the stability of components (such software may be found online). It’s also a good idea to check the software included by the components’ producer. With its help, you can check the parameters and the power drain by specific components of your PC. 

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