Do you need a Modular power Supply? Check this guide before you buy


A modular power supply is used to provide multiple output voltages from many other modules that are convertible. All the converter modules have DC high vulvate bus which is coupled from input and an output voltage is generated. The power factor generates the supplied voltage on DC bus and is used to correct the boost circuit converter which is also connected with an AC source at the input. A battery backup module can be connected with a high voltage DC bus and used to supply the power when the voltage of the bus drops under a level that is not determined.


The modular supply system has a DC voltage bus and a circuit converter which boosts the input that is coupled with a source generating power and a DC voltage signal from an input line which is supplied by the power source. There is an output that is connected with the DC voltage bus and it is present in a boost circuit converter. The supply system which is modular has a module with one converter which is coupled to the DC voltage bus and converts the DC voltage signals to another Dc voltage signal. The other newly produced DC converter module has a down converter or it can be a up converter where the magnitude is greater. The modular power supply system has a battery backup module with an input and output which is connected with a DC voltage signal which has  a responsive magnitude of the DC voltage signal having a decreased value then the reference value.

The modular power supply system also has a first control circuit which generates a voltage in a controlled manner and in which the initial voltage is connected to the input of the circuit converted for the check and balance of the line voltage. It also has another coupled input voltage with the DC voltage which monitors the DC signal. The initial and second module of voltage supplies the control voltage signal. Therefore, this object is invented for the provision of the modular supply system which is capable to power the computer and the equipments of telecom. It has a very high reliability and prevents the disturbance caused by the outputs. It provides inverter circuits by using inverter transformers which helps in controlling the leaked inductance.

Moreover, it has a controlled transformer structure with a leakage voltage signal that has a magnitude that is lesser than the first DC voltage signal and there is an inductance that is determined previously and can be manufactured again and again. However, the modular power supply boosts the voltage and supplies the output modules and converts the boosted voltage in a determined manner. It provides a backup battery that checks the high voltage and maintains the voltage in a limited and regulated manner which checks the high voltages and maintains the DC bus voltages of the output modules.



The PSU has many attached cables and can be easily used, so provides an advantage of not using cables at times. It has a very messy cable management and incorporating all the cables is difficult. Not being able to manage the cables means that one can not differentiate between good and bad airflow or the operating temperature is difficult.


Only the cables which are needed are attached previously. This means the 24PIN ATX, a single PCIe or some CPU having 8 pin and some peripheral cables can be used. The cables are less clustered and definitely cheap with having fewer or no modules.

Full modular

There are no cables used and only some can be attached when needed.
The cost is high but options are many, thus allowing to install the cables we need and keep the flow of air or manage the cable to its maximum. All the latest PSU are modular.

Full modular psu

What is a PSU?

The power supply unit (PSU) is an internal hardware component of IT. The power supply units are not used for supplying power to the systems instead are used to convert them. Especially it is used to convert the high voltage current which is alternating to the direct current thus regulating the DC output voltage to keep the modern computing systems tolerant. Mostly the power supplies have a switched mode having advantages related to efficiency, and design multiple voltage inputs easily. The PSU can be operated in different countries where the input of power is changed. For instance, UK, where the voltage is 240V 50Hz or in Australia and other countries where the voltage is 120V 60Hz.



They also work in same way as the modular power supplies but as in the prior supply there are few cables used or all cables are detached but in later all the cables are soldered and can be used in the server systems. The cables are fixed and attached with an internal circuit and can be taken out by using a small hole at the back of the computer and mounted on the computer, thus fixed and cannot be detached.


  • They are very common and used as static computers, equipment’s in workplaces and in gaming PCs or zones.
  • These are used in systems built in a budget and can power the systems in an efficient manner.
  • The non-modular power supply can be used in buildings that are budgeted and windowless chassis is built in them.
  • The non-modular power supplies are much cheaper than the modular power supplies.


  • As there are many cables attached so you need management in an effective manner for maintaining the airflow otherwise it would damage the equipment’s internally because of overheating.
  • If the cables are not managed properly so the appearance seems bad and ugly.
  • As all the cables are fixed at a point so the cable which is not in use is difficult to remove as it is also soldered inside.
  • As the cables are not used fully so their might e some dirt and tangled wires which do not seem presentable.
  • The excess wires would indulge with the circulation of air and lead to heating of the equipment’s and might affect the cooling systems.


The cables in the fully modular power supplies are detached or disconnected. In fact, there are no cables which are built fully in the modular units as they are supplied in a separate way. Some additional cables are also needed for the modular power supply as the wires are in some socket thus supplying power to all the needed and standard components. This means that the units of the devices and systems can be connected and disconnected when needed. The manufacturers create blocks and place necessary amount of stuffing’s inside for provision of best quality.


  • The cables can be configured as needed or liked.
  • There are not many cables which are lying used or unused and provide a compact value of the system.
  • As the cables are compacted so the appearance is not spoiled.
  • As there are fewer cables used so the dirt and extra dust would be less with no more hanging out of unused wires which causes disruption in the airflow or circulation and restricts the overheating processes.
  • The mess created due to mismanagement of cables can be eliminated as the managed cables are flexible and there is no need of unnecessary cables to be placed now.
  • The modular PSUs are compatible with different power cables which adds more to the design.
  • The cables are not fixed and can be connected or disconnected when needed so the cable does not cause any trouble.
  • The non-presence of cables means the temperature is low and systems are reliable.


  • The cost of modular supply systems is very expensive than regular systems and this is a disadvantage of the PSU.


In semi modular supply cables, the wires are built in for connection of main components of the computers such as the motherboards, other hardwares and processors. Additionally, with the cables which are dedicated, SATA cables or some other PC cables are options in modular systems. The cables are limited and attached permanently with the power supply and not with rest of the cables. The cables can be attached or detached from the power supply. The cables can be attached separately and disconnected when not needed. The equipments can be added as per the units and requirements of the system. But there are some equipment which cannot be disconnected and there are power supplies having some main cables with 24-pin, 8-pin or PC cable and are connected with the same source.


  • The cables which are left unused are connected with the connectors individually and are most importantly required for the PC.
  • The cables can be kept inside and, in the cases, this helps in increasing the performance over the wires that are connected with the system.
  • The sources which are semi modular have fixed cables and are sometimes used like the cables generally connected with the PC.
  • The semi modular power supply is cheap and saves money even when incorporated with the PC. There is no need to compromise with the cables which are unused or even if many of the cables are connected previously.


  • It is little over expensive as compared to non-modular power saving units.


The choice depends on many factors such as budget, use of the systems and PC. If the budget is low then semi modular is best opted for. This also helps in producing customized supplies if one wants to remain in budget. This also has one more plus point that it can easily be converted to a fully modular power supply if the budget gets to expand. If basic functions are to be performed on a PC then non-modular is a good option. Many functions or tasks like low memory games, documentation and web browsing can be in a modular type. 

If one want to build a system or a PC from the base then one has the option to pick whatever they want so the components chosen must be best and can be used to form an excellent system which helps in performing the tasks. But with an existing system the PSU if needed to be changed so some factors must be kept in mind. Some factors are presented below:

  • One must check that the PSU provides the power which is needed by the system to run smoothly and an old PSU must be seen in terms of usage of wattage capacity. One can get an idea from existing PSU and this can help in choosing better options.
  • The required wattage of the SSD and RAM must also be seen before incorporating the PSU. These components can be incorporated together and ineffective ways to show better performance.
  • The size of the PSU must be considered so that it can be easily fitted with your system and it is called a form factor when there are many different types that are presented. Let’s say an ATX can be incorporated in a typical CPU and smaller and micro, mini ATX can be used having a maximum capacity.
  • So its important to look at a better case and there must be some available space for the power supply unit when there is need of some high supply unit. But then choices can be made accordingly.


Estimate WattageTypical Power Requirements
200-1800 watts30-50 watts AGP video card

50-150 watts PCI express video card

10 watts regular PCI card

20-30 watts CD/DVD

15-30 watts hard drive

50-150watts motherboard

140-180 watts for processor


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In a nutshell, it can be seen that power supply units are used in accordance with the requirements of the systems. Each type has its own pros and cons but can be incorporated by keeping some factors in view. Moreover, the types of power supply have different costs and wattage which help in comparing in a batter and effective way.