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One of the key components modern computer is the power supply. Do you want to learn how to choose the right PSU? - in our blog.

What percentage do we set? AMD Ryzen (AM4) Ryzen 7 1800X / 1700X Ryzen 7 1800 Pro / 1700 Ryzen 5 1600X Ryzen 5 1600/1500/1400X/1400/1300 Ryzen 3 1200X/1200/1100 FX-8XXX Phenom II X6 Phenom II X3 Phenom II X2 Athlon II X4 Athlon II X3 Athlon II X2 Phenom X4 Phenom X3 Athlon 64 FX (Dual Core) Athlon 64 FX (Single Core) Athlon 64 X2(90nm) Athlon 64 X2(65nm) Athlon 64 (90nm) Athlon 64 (65nm) ) Sempron 7th generation - Kaby Lake (s1151) Core i7-7700K Core i7-7700 Core i5-7600K Core i5-7600/7500/7400 Core i3-7350K Core i3-7320/7300/7100 6th generation - Skylake-S (s1151 ) Core i7-6700K/6600K Core i7-6700 Core i5-6600K Core i5-6600/6500/6400 Core i3-6320/6300/6100 Pentium G4520/G4500 Pentium G4400 Celeron G3920/G3900 - Old Intel Core i7 (LGA1366) Intel Core i7 (LGA1156) Intel Core i7 (LGA1155) Intel Core i5 (LGA1156) Intel Core i5 (LGA1155) Intel Core i3 (LGA1156) Intel Core i3 (LGA1155) Intel Pentium Dual-Core Intel Celeron Dual-Core Intel Core 2 Extreme ( Quad Core) Intel Core 2 Extreme (Dual Core) Intel Core 2 Quad Series Intel Core 2 Duo Series Intel Pentium E Series Intel Pentium EE Intel Pentium D Intel Pentium 4 Cedar Mill Intel Pentium 4 Prescott Intel Pentium 4 Northwood Intel Celeron D Prescott Intel Celeron D Northwood Intel Celeron Conroe-L

Tell the motherboard where we'll put it all Budget (up to $100) Medium (from $100-200) Top-end (more than $200) Workstation (WS) Server

Now, choose your video card. AMD Radeon HD 6770 AMD Radeon HD 6750 AMD Radeon HD 6670 AMD Radeon HD 6570 AMD Radeon HD 6450 ATI Radeon HD 5970 ATI Radeon HD 5870 X2 ATI Radeon HD 5870 ATI Radeon HD 5850 ATI Radeon HD 5830 ATI Radeon HD 5770 ATI Radeon HD 5750 ATI Radeon HD 5670 ATI Radeon HD 5570 ATI Radeon HD 5550 ATI Radeon HD 5450 ATI Radeon HD 4890 ATI Radeon HD 4870 X2 ATI Radeon HD 4870 ATI Radeon HD 4850 X2 ATI Radeon HD 4850 ATI Radeon HD 4830 ATI Radeon HD 4770 ATI Radeon HD 4730 ATI Radeon HD 4670 ATI Radeon HD 4650 ATI Radeon HD 4550 ATI Radeon HD 4350 ATI Radeon HD2900 Series ATI Radeon HD2600 Series ATI Radeon HD2400 Series ATI Radeon X1950 XT(X) ATI Radeon X1950 Series ATI Radeon X1900 XT(X) ATI Radeon X1900 Series ATI Radeon X1800 Series ATI Radeon X1650 Series ATI Radeon X1600 Series ATI Radeon X1550 Series ATI Radeon X1300 Series ATI Radeon X800 Series ATI Radeon X700 Series ATI Radeon X600 Series ATI Radeon X300 Series ATI Radeon 9800 Series ATI Radeon 9700 Series ATI Radeon 9600 Series ATI Radeon 9550 Series ====== ===Nvidia VGA Cards======= NVIDIA GeForce GTX 590 NVIDIA GeForce GTX 580 NVIDIA GeForce GTX 570 NVIDIA GeForce GTX 560 Ti NVIDIA GeForce GTX 550 Ti NVIDIA GeForce GT 520 NVIDIA GeForce GTX 480 NVIDIA GeForce GTX 470 NVIDIA GeForce GTX 465 NVIDIA GeForce GTX 460 NVIDIA GeForce GTS 450 NVIDIA GeForce GT 440 NVIDIA GeForce GT 430 NVIDIA GeForce GTX 295 NVIDIA GeForce GTX 285 NVIDIA GeForce GTX 280 NVIDIA GeForce GTX 275 NVIDIA GeForce GTX 260 NVIDIA GeForce GTS 250 NVIDIA GeForce GT 240 NVIDIA GeForce GT 220 NVIDIA GeForce 210 NVIDIA GeForce 9800 GX2 NVIDIA GeForce 9800 GTX+ NVIDIA GeForce 9800 GTX NVIDIA GeForce 9800 GT NVIDIA GeForce 9600 GT NVIDIA GeForce 9600 GSO 512 NVIDIA GeForce 9600 GSO NVIDIA GeForce 9500 GT NVIDIA GeForce 9400 GT Nvidia GeForce 8800GTX Nvidia GeForce 8800GTS Nvidia GeForce 8600 Series Nvidia GeForce 8500 Series Nvidia GeForce 7950GX2 Nvidia GeForce 7950GT(X) Nvidia GeForce 7900 Series Nvidia GeForce 7800 Series Nvidia GeForce 7600 Series Nvidia GeForce 7300 Series 6800 Series Nvidia GeForce 6600 Series Nvidia GeForce 6200 Series Nvidia GeForce FX 5900 Series Nvidia GeForce FX 5700 Series Nvidia GeForce FX 5600 Series Nvidia GeForce FX 5200 Series 1 pc. 2 pcs.

Not Used Integrated Graphics Card =========ATI Video Cards======= AMD Radeon HD 6990 AMD Radeon HD 6970 AMD Radeon HD 6950 AMD Radeon HD 6870 AMD Radeon HD 6850 AMD Radeon HD 6790 AMD Radeon HD 6770 AMD Radeon HD 6750 AMD Radeon HD 6670 AMD Radeon HD 6570 AMD Radeon HD 6450 ATI Radeon HD 5970 ATI Radeon HD 5870 X2 ATI Radeon HD 5870 ATI Radeon HD 5850 ATI Radeon HD 5830 ATI Radeon HD 5770 ATI Radeon HD 5750 ATI Radeon HD 5670 ATI Radeon HD 5570 ATI Radeon HD 5550 ATI Radeon HD 5450 ATI Radeon HD 4890 ATI Radeon HD 4870 X2 ATI Radeon HD 4870 ATI Radeon HD 4850 X2 ATI Radeon HD 4850 ATI Radeon HD 4830 ATI Radeon HD 4770 ATI Radeon HD 4730 ATI Radeon HD 4670 ATI Radeon HD 4650 ATI Radeon HD 4550 ATI Radeon HD 4350 ATI Radeon HD2900 Series ATI Radeon HD2600 Series ATI Radeon HD2400 Series ATI Radeon X1950 XT(X) ATI Radeon X1950 Series ATI Radeon X1900 XT(X) ATI Radeon X1900 Series ATI Radeon X1800 Series ATI Radeon X1650 Series ATI Rad eon X1600 Series ATI Radeon X1550 Series ATI Radeon X1300 Series ATI Radeon X800 Series ATI Radeon X700 Series ATI Radeon X600 Series ATI Radeon X300 Series ATI Radeon 9800 Series ATI Radeon 9700 Series ATI Radeon 9600 Series ATI Radeon 9550 Series ======= ==Nvidia VGA Cards======= NVIDIA GeForce GTX 590 NVIDIA GeForce GTX 580 NVIDIA GeForce GTX 570 NVIDIA GeForce GTX 560 Ti NVIDIA GeForce GTX 550 Ti NVIDIA GeForce GT 520 NVIDIA GeForce GTX 480 NVIDIA GeForce GTX 470 NVIDIA GeForce GTX 465 NVIDIA GeForce GTX 460 NVIDIA GeForce GTS 450 NVIDIA GeForce GT 440 NVIDIA GeForce GT 430 NVIDIA GeForce GTX 295 NVIDIA GeForce GTX 285 NVIDIA GeForce GTX 280 NVIDIA GeForce GTX 275 NVIDIA GeForce GTX 260 NVIDIA GeForce GTS 250 NVIDIA GeForce GT 240 NVIDIA GeForce GT 220 NVIDIA GeForce 210 NVIDIA GeForce 9800 GX2 NVIDIA GeForce 9800 GTX+ NVIDIA GeForce 9800 GTX NVIDIA GeForce 9800 GT NVIDIA GeForce 9600 GT NVIDIA GeForce 9600 GSO 512 NVIDIA GeForce 9600 GSO NVI DIA GeForce 9500 GT NVIDIA GeForce 9400 GT Nvidia GeForce 8800GTX Nvidia GeForce 8800GTS Nvidia GeForce 8600 Series Nvidia GeForce 8500 Series Nvidia GeForce 7950GX2 Nvidia GeForce 7950GT(X) Nvidia GeForce 7900 Series Nvidia GeForce 7800 Series Nvidia GeForce 7600 Series Nvidia GeForce 7300 Series Nvidia Series Nvidia GeForce 6600 Series Nvidia GeForce 6200 Series Nvidia GeForce FX 5900 Series Nvidia GeForce FX 5700 Series Nvidia GeForce FX 5600 Series Nvidia GeForce FX 5200 Series 1 pc. 2 pcs.

How much RAM will we install? 256MB DDR 512MB DDR 1GB DDR 512MB DDR2 1GB DDR2 2GB DDR2 4GB DDR2 1GB DDR3 2GB DDR3 4GB DDR3 1pcs 2 pcs. 3 pcs. 4 things.

Choose optical drive DVD-RW COMBO CD-RW DVD-ROM CD-ROM Not installed 1 pc. 2 pcs. 3 pcs. 4 things.

Choose HDD(HDD) 7200RPM 3.5" HDD 5400RPM 3.5" HDD 10,000RPM 3.5" HDD 1 pcs 2 pcs 3 pcs 4 pcs 5 pcs 6 pcs 7 pcs 8 pcs

Nothing installed 1 board (slot) 2 boards (slots) 3 boards (slots) 4 boards (slots)

not installed installed

1 (CPU) 2 fans 3 fans 4 fans 5 fans 6 fans

No stock required! add +25W add +50W add +100W add +150W add +200W add +250W add +300W (nah?)

To start the system you will need a power supply capable of supplying at least Tue. However, it is possible, and most likely will be, "crashes" in games and tests (for example, in Furmark).

It is important: the power shown above is the total power of the power supply. A much more important characteristic is the power of the + 12V branch. For your configuration, the power supply must provide at least W (A) in total for all branches + 12V.

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The power supply is designed to supply electrical current to all computer components. It must be powerful enough and have a small margin for the computer to work stably. In addition, the power supply must be of high quality, since the life of all computer components greatly depends on it. If you save $10-20 on buying a high-quality power supply, you risk losing a system unit worth $200-1000.

The power of the power supply is selected based on the power of the computer, which mainly depends on the power consumption of the processor and video card. You also need the power supply to be at least 80 Plus Standard certified. Optimal in terms of price / quality ratio are Chieftec, Zalman and Thermaltake power supplies.

For an office computer (documents, Internet), a 400 W power supply is enough, take the cheapest Chieftec or Zalman, you can't go wrong.
Zalman LE II-ZM400 power supply

For a multimedia computer (movies, simple games) and an entry-level gaming computer (Core i3 or Ryzen 3 + GTX 1050 Ti), the most inexpensive 500-550 W power supply from the same Chieftec or Zalman is suitable, it will have a reserve in case of installing more powerful graphics card.
Chieftec GPE-500S power supply

For a mid-range gaming PC (Core i5 or Ryzen 5 + GTX 1060/1070 or RTX 2060), a 600-650 W power supply from Chieftec is suitable, if there is an 80 Plus Bronze certificate, then good.
Chieftec GPE-600S power supply

For a powerful gaming or professional computer (Core i7 or Ryzen 7 + GTX 1080 or RTX 2070/2080), it is better to take a 650-700 W PSU from Chieftec or Thermaltake with 80 Plus Bronze or Gold certification.
Chieftec CPS-650S power supply

2. Power supply or case with power supply?

If you are building a professional or powerful gaming computer, then the power supply is recommended to be selected separately. If we are talking about office or ordinary home computer, then you can save money and buy a good case complete with a power supply, which will be discussed.

3. What is the difference between a good power supply and a bad one

The cheapest power supplies ($20-30) by definition cannot be good, since manufacturers in this case save on everything they can. Such power supplies have bad heatsinks and a lot of unsoldered elements and jumpers on the board.

In these places there should be capacitors and chokes designed to smooth out voltage ripples. It is because of these ripples that the premature failure of the motherboard, video card, hard drive and other computer components occurs. In addition, such power supplies often have small heatsinks, which cause overheating and failure of the power supply itself.

A high-quality power supply has a minimum of unsoldered elements and larger radiators, which can be seen from the mounting density.

4. Manufacturers of power supplies

Some of the best power supplies are made by SeaSonic, but they are also the most expensive.

Not so long ago expanded the range of power supplies well famous brands for Corsair and Zalman enthusiasts. But their most budgetary models have a rather weak filling.

AeroCool power supplies are one of the best in terms of price / quality ratio. A well-established manufacturer of coolers DeepCool is getting close to them. If you don’t want to overpay for an expensive brand, but still get a quality power supply, pay attention to these brands.

FSP manufactures power supplies under various brands. But I would not recommend cheap PSUs under their own brand, they often have short wires and few connectors. Top FSP power supplies are not bad, but at the same time they are no longer cheaper than famous brands.

Of those brands that are known in narrower circles, one can note very high-quality and expensive be quiet!, powerful and reliable Enermax, Fractal Design, slightly cheaper, but high-quality Cougar and good, but inexpensive HIPER as a budget option.

5.Power supply

Power is the main characteristic of the power supply. The power of the power supply is calculated as the sum of the power of all computer components + 30% (for peak loads).

For an office computer, a minimum power supply of 400 watts is enough. For a multimedia computer (movies, simple games), it is better to take a 500-550 watt power supply, in case you later want to install a video card. For a gaming computer with one video card, it is desirable to install a power supply with a capacity of 600-650 watts. A powerful gaming PC with multiple graphics cards may require a power supply of 750 watts or more.

5.1. Power supply power calculation

• Processor 25-220 Watts (check on the website of the seller or manufacturer)
• Video card 50-300 watts (check the website of the seller or manufacturer)
• Entry-level motherboard 50 watts, mid-range 75 watts, high class 100 watts
• Hard drive 12 watt
• 5W SSD
• DVD drive 35 watts
• Memory module 3 Watt
• Fan 6 Watt

Do not forget to add 30% to the sum of the capacities of all components, this will protect you from unpleasant situations.

5.2. Program for calculating the power of the power supply

For a more convenient calculation of the power of the power supply, there is an excellent program "Power Supply Calculator". It also allows you to calculate the required capacity of an uninterruptible power supply (UPS or UPS).

The program works on all versions of Windows with "Microsoft .NET Framework" version 3.5 or higher installed, which is usually already installed by most users. Download the program "Power Supply Calculator" and if you need "Microsoft .NET Framework" you can at the end of the article in the "" section.

6.ATX standard

Modern power supplies have the ATX12V standard. This standard may have several versions. Modern power supplies are manufactured according to the ATX12V 2.3, 2.31, 2.4 standards, which are recommended for purchase.

7. Power correction

Modern power supplies have a power correction function (PFC), which allows them to consume less energy and heat up less. There is a passive (PPFC) and an active (APFC) power correction scheme. The efficiency of power supplies with passive power correction reaches 70-75%, with active - 80-95%. I recommend purchasing power supplies with active power correction (APFC).

8. Certificate 80 PLUS

A quality power supply must be 80 PLUS certified. These certificates come in different levels.

• Certified, Standard - entry-level power supplies
• Bronze, Silver - middle class power supplies
• Gold - high-end power supplies
• Platinum, Titanium - top power supplies

The higher the level of the certificate, the higher the quality of voltage stabilization and other parameters of the power supply. For a mid-range office, multimedia or gaming computer, a regular certificate is sufficient. For a powerful gaming or professional computer, it is advisable to take a power supply with a bronze or silver certificate. For a computer with several powerful video cards - gold or platinum.

9. Fan size

Some power supplies still come with an 80mm fan.

A modern PSU should have a 120mm or 140mm fan.

10. Power supply connectors

	ATX (24-pin) - motherboard power connector. All power supplies have 1 such connector.
	CPU (4-pin) - processor power connector. All power supplies have 1 or 2 of these connectors. Some motherboards have 2 processor power connectors, but can work from one.
	SATA (15-pin) - power connector hard drives and optical drives. It is desirable that the power supply has several separate cables with such connectors, since it will be problematic to connect a hard drive and an optical drive with one cable. Since there can be 2-3 connectors on one cable, the power supply must have 4-6 such connectors.
	PCI-E (6 + 2-pin) - video card power connector. Powerful graphics cards require 2 of these connectors. To install two video cards, you need 4 of these connectors.
	Molex (4-pin) - power connector for obsolete hard drives, optical drives and some other devices. In principle, it is not required if you do not have such devices, but it is still present in many power supplies. Sometimes this connector can supply voltage to the backlight of the case, fans, expansion cards.
	Floppy (4-pin) - drive power connector. Very outdated, but it can still be found in power supplies. Sometimes some controllers (adapters) are powered by it.

Specify the configuration of power supply connectors on the website of the seller or manufacturer.

11. Modular power supplies

In modular power supplies, extra cables can be unfastened and they will not interfere in the case. This is convenient, but such power supplies are somewhat more expensive.

12. Setting filters in the online store

1. Go to the "Power supplies" section on the seller's website.
2. Select recommended manufacturers.
3. Choose the required power.
4. Set other important parameters for you: standards, certificates, connectors.
5. Browse positions sequentially, starting with the cheapest ones.
6. If necessary, specify the connector configuration and other missing parameters on the manufacturer's website or another online store.
7. Buy the first model that fits all parameters.

Thus, you will get the best value for money power supply that meets your requirements at the lowest possible cost.

13. Links

Power Supply Corsair CX650M 650W
Power Supply Thermaltake Smart Pro RGB Bronze 650W
Zalman ZM600-GVM 600W power supply

80 years have passed since then and I still ask myself the same question ( approx. - What is electricity?), but unable to answer it. © Nikola Tesla

Power Supply Power Calculators

If you came here only to calculate the power for your PSU, then

The importance of the power supply

Component quality

The quality of the installed electronic components has a significant impact on the final price. An example here is the electrolytic capacitors used. The power supply is a node that heats up significantly during operation, especially if the PC has a ventilation scheme that creates a vacuum inside the case, in which part of the hot air moves through the PSU. The most common and inexpensive aluminum electrolytes have a maximum allowable temperature of 85 °C, but even slightly lower heating significantly reduces their MTBF. In reliable power supplies, conscientious manufacturers use more resistant types of capacitors, but the price of the product is higher. The choice of the manufacturer in favor of specialized diode assemblies or discrete elements has a corresponding effect on the final cost. In the first case, the bridge rectifier is guaranteed the identical performance of both arms and the maximum possible symmetry, and in the second case, a higher profitability of production.

circuit solutions

Modern power supplies can have several independent lines in +5 and +12 V circuits. The ideal, albeit expensive, circuit solution here is separate rectifiers (especially synchronous), and individual output filters are acceptable. In budget models, the most primitive options for obtaining “parallel” lines are often found, implemented by simply connecting wires to a common contact. The obvious disadvantage of such a simplification is the impossibility of effectively stabilizing the output voltage and the mutual influence of consumers. Cheap PSUs may not have EMI input filters or are equipped with simplified single-loop solutions. In other words - with a high probability they will create problems for other electrical appliances in the course of their work.
If budget power supplies usually provide two types of protection: against short-term overvoltage in the external network and short circuit inside the unit, then high-quality devices support a more advanced security package. The best models are equipped with an intelligent circuit based on a special chip and are able to respond in a timely manner to excessive current consumption, overheating and undervoltage. In addition, inexpensive blocks do not have protection that prevents them from being turned on without a regular load, while such an operating mode is not terrible for expensive solutions.

Consequences of the choice

Spontaneous reboot of the computer can be caused not only by the unstable operation of the motherboard, memory problems or software reasons. Any power supply controls the output voltage level in all circuits and generates a control signal that allows the PC to be turned on. The latter is a logical unit that enters the input of the corresponding key element of the motherboard responsible for issuing the general reset command. The absence or short-term loss of the Power_OK signal automatically causes a reboot of the system, and the cause can be either the voltage going beyond the permissible limits or the incorrect operation of the control unit itself. For low-quality PSUs, the opposite manifestations are also possible, for example, the low speed of operation of this protection, tracking not all circuits, or giving a signal until the levels are completely stabilized (insufficient delay).
Another characteristic feature of budget power supplies is the use of the minimum allowable values ​​of electrolytic capacitors installed in the output filters. Their capacity directly affects the shutdown time during which the PSU is able to maintain the required voltage levels, allowing the computer to urgently complete critical operations. In the event of a short-term loss of mains power, it is even possible to continue the operation of the PC without rebooting. Simply put, some high-quality PSU models have a “built-in uninterruptible power supply”.

For a computer, it directly depends on what components are installed on it. If the power is not large enough, the system simply will not start.

Criteria for selecting a power supply

First you need to review the installed equipment: motherboard, video card, processor, processor cooler, hard drive (if there is one) and disk drive. Next, measure the power consumption of each of them. How to calculate the power of the power supply if the video card and processor support overclocking? It's simple - you need to measure the power consumption of these components in the overclocking state.

Of course, there is a more simplified version - this is online calculator. To use it, you will need the Internet and knowledge of your own equipment. The data of the components are entered in the required fields, and the calculator calculates the power supply for the PC.

If the user intends to install optional equipment, for example, another cooler or hard drive, then the calculations will have to be done based on additional data.

The first step to how to calculate the power supply for a computer is to calculate the efficiency of the unit itself. Most often it happens that a block of 500 watts can produce no more than 450 watts. In this case, you need to pay attention to the numbers on the block itself: the most great importance indicates the total power. If you add up the total load of the PC and the temperature, you get an approximate calculation of the power of the power supply for the computer.

Power consumption of components

The second item is a cooler that cools the processor. If the power dissipation does not exceed 45 watts, then such a cooler is only suitable for office computers. Multimedia PCs draw up to 65 watts, and the average gaming PC will require cooling, with a power dissipation of 65 to 80 watts. Those who are building the most powerful gaming or professional PC should expect a cooler with a capacity of over 120 watts.

The third point is the most inconsistent - this is the video card. Many GPUs are able to work without additional power, but such cards are not gaming. Modern video cards require an additional power supply of at least 300 watts. What power each video card has is indicated in the description of the GPU itself. You also need to consider the possibility of overclocking the graphics card - this is also an important variable.

Internal burners consume, on average, no more than 30 watts, the same power consumption has an internal hard drive.

The last item on the list is the motherboard, which consumes no more than 50 watts.

Knowing all the parameters of their components, the user will be able to decide how to calculate the power supply for the computer.

What system can fit a 500 watt power supply?

It’s worth starting with the motherboard - an average board in terms of parameters may be suitable. It can have up to four slats under RAM, one slot for a video card (or several - it depends only on the manufacturer), a socket for a processor no older than support for an internal hard drive (size does not matter - only rpm), and a 4-pin connector for a cooler.

The processor can be either dual-core or four, the main thing is the lack of overclocking (it is indicated by the letter "K" at the end of the processor model number).

The cooler for such a system should be with four connectors, because only four pins will provide control of the fan speed. The lower the speed, the less energy is consumed and the less noise.

The video card, if it is NVIDIA, can be from GTS450 to GTS650, but not higher, since only these models can do without additional power and do not support overclocking.

The remaining components will not greatly affect the energy consumed. Now the user is more oriented in how to calculate the power supply for a PC.

The main manufacturers of power supplies for 500 watts

The leaders in this area are EVGA, Zalman and Corsair. These manufacturers have established themselves as high-quality suppliers of not only power supplies, but also other PC components. AeroCool also boasts popularity in the market. There are other manufacturers of power supplies, but they are less well-known and may not have the necessary parameters.

Description of power supplies

Opens the EVGA 500W power supply list. This company has long established itself as a quality manufacturer of PC components. So, this block has a bronze certificate 80 Plus - this is a special guarantee of quality, which means good stability of the block from voltage surges. 12 millimeters. All cables have a shield braid, and the plugs are labeled where and what they belong to. Guarantee of use - 3 years.

The next representative is AeroCool KCAS 500W. This manufacturer deals exclusively with cooling and powering the PC. This power supply can withstand input voltage up to 240 volts. Bronze 80 Plus certified. All cables have a screen braid.

The third manufacturer of a 500w computer power supply is ZALMAN Dual Forward Power Supply ZM-500-XL. This company has also established itself as a manufacturer of quality PC products. The fan diameter is 12 centimeters, only the main cables have a screen braid - the rest are fastened with ties.

The following is a lesser known manufacturer of a 500w computer power supply - ExeGate ATX-500NPX. Of the 500 watts shown, 130 watts are for 3.3 volt equipment and the remaining 370 watts are for 12 volt equipment. The fan, like the previous blocks, has a diameter of 120 millimeters. The cables do not have a screen braid, but are held together with cable ties.

Last on the list, but not the worst, is the Enermax MAXPRO, which has an 80 Plus Bronze Quality Certification. This power supply is designed for a motherboard, the size of which corresponds to the ATX marking. All cables are shielded.

Conclusion

This article described in detail how to calculate a power supply for a computer, what equipment is best suited for such purposes, a description of the blocks themselves from leading manufacturers and their photos.

After the successful opening of the international forum technical support, Enermax offers its customers a new useful "service advisor": The new online power supply wattage calculator allows users to quickly and easily calculate the power consumption of the system. On the occasion of the opening of the new service, users can win three popular power supplies from Enermax.

Before buying a power supply, most buyers ask themselves what level of power consumption is needed to power their system. Not always the indications of individual manufacturers are accurate enough to calculate the total amount of energy consumption of the entire system. Many users follow the motto "more is better than less" in this case. Result: the choice of a too powerful and more expensive power supply that will be loaded on full power systems by only 20-30 percent. It should be taken into account that modern power supplies, such as Enermax, achieve efficiency above 90 percent only when the power supply is loaded at about 50 percent.

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