Additional power connector 6 pin. Connecting power to the video card. Floppy drive power connector

Power connectors for peripheral devices

Except for the motherboard connectors, everything Power supplies are also equipped with various additional connectors, most of which are designed to power disk drives and other peripheral devices, such as a powerful video card. Most peripheral connectors, in turn, comply with industry standards for a particular form factor. In this part of our material we will look at what additional connectors you can find in your PC.

Peripheral power connector

Perhaps the most common type of connector that can be found on all power supplies is the peripheral power connector, which is also often called the disk drive power connector. What we understand as this type of connector first appeared in the AMP power supplies in the PSU series and was called the MATE-N-LOK connector, but since it began to be manufactured and sold by Molex, it has also been called the “Molex connector” which is not entirely correct.

To determine the pin location, look closely at the connector. As a rule, on the right side of the plug there is a plastic tab and a key, which is necessary for correctly fixing the connector in the socket. The following diagram shows a standard connector with a key on the plug. This is the connector that is used to power disk drives (and not only):

Peripheral power connector

This connector has been used on all PCs, from the original IBM PC to modern systems. It is best known as a disk drive connector, but is also used in some systems to provide additional power to the motherboard, graphics card, cooling fans, and any other PC components that may use +5 V or +12 V.

This is a 4-pin connector that has four round-shaped contacts located at a distance of 5 mm from each other and rated for a current of up to 11 A each. Since the connector includes one +12 V and one +5 V contact (the other two are ground), the maximum current power through the connector reaches 187 W. The connector plug is about 2 cm wide and can be connected to most disk drives and some other PC components. In the following table we show the assignment of contacts on this connector:

Floppy drive power connector

In the mid-1980s, 3.5-inch magnetic disk drives first appeared, and then it became clear that they needed a more compact power connector. The answer was what is today known as the floppy drive power connector, which was developed by AMP as part of the EI (Economy Interconnection) series. These connectors are used to power small disk drives and devices, and have the same +12 V, +5 V and ground pins as the large peripheral connector. The distance between the contacts in this type of plug is 2.5 mm, and the plug itself is about half the size of a large connector. All contacts are rated at 2 A each, so the maximum current through this connector is only 34 W.

The following table shows the pin configuration on the floppy drive power connector:

The power connector for peripheral devices and its younger brother have a universal pin layout, as can be seen in the following diagram:

Peripheral power connector and floppy drive connector

The pin layout of the floppy connector is mirrored compared to the larger peripheral connector. When using an adapter from one type of connector to another, you should be careful and remember that in this case the red and yellow wires are swapped.

First Power supplies were equipped with only two connectors for peripherals, while modern power supplies have four or more large connectors and one or two connectors for floppy drives. Depending on the power and purpose, some power supplies have eight or even more connectors for peripheral devices.

If you use many hard drives or other devices that require additional power, you can use a Y-splitter, as well as a large-to-small connector adapter. The splitter allows you to turn one power connector for peripheral devices to connect two drives to it at once, and with an adapter you can use a large connector to power a floppy drive. If you are using multiple adapters, make sure the total power is power supply is sufficient. The total load of the connectors connected to the splitter should not exceed the capacity of one connector.

Serial ATA power connector

The vast majority of modern hard drives and all SSDs are equipped with a SATA power connector. So, if a few years ago SATA connectors on power supplies were some kind of nice option, then on new power supplies they are mandatory. The SATA (Serial ATA) power connector is a special 15-pin connector that uses only five wires, which means that three pins per connector are connected to one wire. The total power supply through this connector is exactly the same as that of a conventional connector for peripherals, but the SATA cable is noticeably thinner.

SATA power connector

In the SATA power connector, each wire is connected to three contacts, and the numbering of the wires does not correspond to the numbering of the contacts. If your power supply is not equipped with SATA power connectors, you can use an adapter from a regular connector for peripheral devices. However, such adapters do not provide voltage on the +3.3 V line. Fortunately, this is not an issue for most SATA devices, since they do not use the +3.3 V line and only use +12 V and +5 V voltages.

Adapter from connector for peripheral devices to SATA

Additional power connector for PCI-E video cards

The ATX12V 2.x specification uses a new 24-pin motherboard power connector that provides more power to power various on-board controllers and PCI-E cards. The specification is designed for an additional 75 W of power directly for the PCI-E x16 slot and this power, in principle, is enough for many video cards with average performance. But high-end graphics cards typically require higher power levels. For this reason, the PCI-SIG (Special Interest Group) development group has introduced two standards for providing additional power to PCI-E video cards, which involve the use of the following connectors:

• PCI Express x16 Graphics 150 W-ATX - specification published in October 2004. An additional 6-pin (2x3) connector is used, which provides an additional 75 W of power. The total power of the PCI-E x16 slot reaches 150 W.
• PCI Express 225 W/300 W High Power Card Electromechanical - specification published in March 2008. Assumes the use of an 8-pin (2x4) additional power connector, providing an additional 150 W of power. The total power is 225 W (75+150) or 300 W (75+150+75).

To video cards that require even more energy, you can connect several connectors at once:

Additional power for PCI Express cards is provided using 6-pin (2x3) or 8-pin (2x4) Molex Mini-Fit connectors, equipped with a female plug that connects directly to the video card. For reference, these connectors are similar to the Molex 39-01-2060 (6-pin) and 39-01-2080 (8-pin), but both use different keys to prevent the possibility of them being mistakenly installed in the +12 V connector on the motherboard board The following diagram shows the layout of the connectors, including the plug side. Pay attention to the "sense" signal on pin 5 - it allows the graphics card to determine whether the connector is connected. Without proper power levels, the card may shut down or operate in a mode with limited functionality. Also note that pin 2 is designated in the table as N/C (No Connection) according to the standard specification, but most power supplies seem to also supply +12 V.

6-pin additional power connector PCI-E 6 pin (2x3), rated for 75 W power

The pin configuration on the 8-pin PCI-E additional power connector is shown in the diagram below. Please note that there is an additional +12 V voltage on pin 2 and two “sense” signals on pin 4 and pin 6, which allows the card to determine which connector is connected - a 6-pin or 8-pin - or whether there is no connection.

8-pin additional power connector PCI-E 8 pin (2x4), rated for 150 W power

The design of both connectors ensures backward compatibility: a 6 pin connector can be connected to an 8 pin socket. Thus, if your graphics card has a socket for an 8-pin connector, but the power supply is equipped only with a 6-pin connector, then you can connect it to the card by simply sliding it relative to the socket, as shown in the figure. The plug has a key design to prevent installation in an incorrect position, but when connecting the connector, you should avoid using excessive force, which may damage the card.

Connecting the 6-pin connector to the 8-pin socket on the graphics card

The signal contacts are located in such a way that the video card itself recognizes what type of connector is connected to the socket and, thus, how much power is available to it. For example, if a video card requires a full 300 W and has two 8 pin sockets (or 8 pin + 6 pin), but you use two six-wire connectors, the card will determine that it can only use 225 W and, depending on the design and firmware, may will either shut down or operate in reduced functionality mode.

Thanks to a special key on the plug, an 8-pin connector cannot be installed in a 6-pin socket. For this reason, many power supply manufacturers equip their products with "6+2" plugs, which allow you to disconnect an additional two if necessary, resulting in a regular 6-pin connector instead of an 8-pin connector. Such a connector, of course, will be installed without problems into the 6 pin socket on the board.

Attention! The 8-pin additional power connector for PCI-E cards and the 8-pin EPS12V standard CPU power connector use Molex Mini-Fit Jr. plugs that are similar in design. These plugs have different keys, but with some effort it may be possible to connect the EPS12V connector to the socket on the video card, or vice versa, connect the PCI-E power connector to the EPS12V socket on the motherboard. In any of these scenarios, the +12V pin will be connected directly to ground, which can lead to failure of the motherboard, video card or power supply.

The 6-pin connector uses two +12V pins to provide up to 75W of power, while the 8-pin connector uses three +12V pins to provide up to 150W. But according to the specification for Molex connectors, this set of pins allows for more power. Each pin on the PCI Express power connector can handle up to 8A of current when using standard pins - or more when using HCS or Plus HCS pins. If you multiply the contact power limits according to the specifications by their number, you can determine the connector’s ability to hold a current of a certain power:

In a 6-wire connector, the current is designed for two +12 V contacts, although most power supplies have three such contacts.

Standard Molex contacts are rated at 8A.

Molex HCS contacts are rated at 11A.

Molex Plus HCS contacts are rated at 12A.

All values ​​are for a set of 4-6 Mini-Fit Jr pins. when using 18 gauge wires and standard temperatures.

Thus, although according to the specification the connectors are designed for a power of 75 (6 pin) and 150 W (8 pin), when using standard contacts the power can reach 192 and 288 W, respectively. By using HCS and Plus HCS contacts you can get even more power.

The two additional power connectors in question may appear in the documentation under the names PCI Express Graphics (PEG), Scalable Link Interface (SLI), or CrossFire Power Connectors, since they are used by high-end PCI-E x16 graphics cards that can work in conjunction with SLI or CrossFire. SLI and CrossFire are modes for using nVidia and AMD cards that allow you to combine cards in a bundle, using the computing resources of each of them to increase the performance of the graphics subsystem. Each card can consume hundreds of watts, which is why many high-end graphics cards have two or three additional power connectors. This means that most powerful

It costs more than 100 rubles, while the Molex 4 pin Male splitter ( photo) at 2x 4 pin Female (at the power supply cable) (photo) - 50 rubles, I decided to go against market conditions and make it from improvised means. Moreover, 20 pin plugs, from which you can make a 6-pin one, exist in old ATX power supplies that are no longer suitable for working with modern computers.

The difference in the design of 6 pin and 20 pin connectors, if you look closely, is that Pins with and without chamfers are arranged differently (photo and drawing). There is a combination of 2 chamfers in one middle vertical row.

However, the necessary beveled chamfer can be easily made with a blade or a construction knife, since the material of the connectors is polyethylene. For the source material of a 6-pin connector, for example, the edge of a 20-pin connector that contains multi-colored wires: white, gray, lilac and others is well suited. We choose it in such a way that it is easy to make 2 chamfers on the middle pin with the tip of a knife. It is tempting to cut out the middle of the connector with the latch, however, it will be slightly different from the place where the mating wedge is located (see the figure on how to make another 6-pin connector from the remaining piece of a 20-pin connector).

The mating part of the adapter (4 pin Molex Male) can be found in the power supply for some fans or in the same 1x2 splitter. The wires are soldered and insulated to the desired contact wires or crimped with the metal of the contact removed from the connector. You can directly connect the 6 pin connector to the power supply if you do not intend to make an adapter.

It is convenient to cut off 6 pins from a 20-pin connector with a hacksaw or using the same construction knife. So that the plastic wall remains on the segment we need. In this case, we do not spare the 4th hole on the edge of the pair of pins, although you can saw it off so as not to damage the wires located there.

After sawing and chamfering, the connector is ready for use; all that remains is to solder the necessary wires to the 4-pin Molex Male connector to ground and to 12 volts (yellow wire). But you can make it more beautiful by rearranging wires of the same color to the same contact ratings (photo)(3 farthest from the board - to GND, 3 closest to +12V). A thin flexible needle will help remove the contact with the wire from the socket. Let's bend the end of the needle with a small “stick” so that, turning it around its axis, press on the protruding contact wedge and bend it inward. There are two such wedges on the contact on opposite sides, so the operation of pressing the wedges must be carried out twice. After this, the contact can be pulled out of the connector by the wire. The figure shows the direction of pressure on the wedges in the connector contact.

After pulling out the wires of the desired color, we straighten the wedges in the contacts again (Fig.)

... and carefully check that they are installed correctly in the places we need. If we make a mistake with the connection, in the best case, the power supply protection will trigger due to a short circuit, and in the worst case, if the polarity is reversed, the video card will fail. So, we place black wires on the ground contacts (GND), and a different color (preferably yellow (12 V), but there are more red wires, from 5 volts) on the 12 volt contacts.

We connect the black wires to the middle pins of the 4 pin Molex connector, and the other 3 wires to the yellow wires of the 12 volt source. Do I need to install 2 Molex connectors? Useful if the video card will consume a lot. In general, 12 volt outputs are often combined in a power supply, so powering a video card from one source will not differ from power from 2 current sources. Before soldering or assembling, it is useful to make sure that we are installing the contacts in the correct sockets.

The adapter was assembled, the wires and power connectors from the old power supply helped the new system unit perform its functions. The cost of the source materials will not exceed 100 rubles, even if a working low-power unit from computers with Pentium II is scrapped. It will take from half an hour to an hour, depending on the skill and preparedness of the workplace.

By the way, this is not an invention of today. Already online you can find instructions with ideas for use exactly this part of the 20-pin connector (in English).

Discussion and comments are made .

Good afternoon In this publication we will look at the different types of connectors that provide power. This issue must be treated with the utmost care, since errors can result in a short circuit at best, and in the worst case, a fire and loss of equipment.

In the process of writing this article, I turned to various sources, ranging from Wikipedia to English-language specifications for each type of power connector. This allowed me to create a table showing power limits that will allow you to avoid using dangerous adapters and splitters. There will be no unnecessary “water” in the article, only what every miner needs to know.

Maximum permissible power

First, let's remember the physics lessons from the school curriculum. There was this formula:

P=I*U

Power is designated by the letter P and is measured in Watts (W). Current strength is designated by the letter I and is measured in Amperes (A). Voltage is designated by the letter U and measured in Volts (V). I will use this formula for all calculations in this material.

When in the article I talk about the maximum permissible power, this should be understood as a limitation imposed by the developers of the power connector. On thematic forums you can often find messages from the series “I connected a bunch of video cards via one PCI-E and everything is fine with me.” With high-quality materials, indeed, this configuration can work for some time, if the author of the message is a thrill-seeker. With low-quality materials, problems can occur even before the maximum current allowed by the standards flows through the adapter.

It is also worth immediately defining the terms. The power connection is the connection of a paired device, that is, consisting of two parts. These parts may have different names in documentation and in colloquial speech. The socket part, as a rule, is located on the device (unless we are talking about adapters, extension cords, etc.). It can be called: socket, female, “mother”, connector, socket. The male part is usually located at the end of the cable and is called: plug, male, male, plug, connector. All these names are widespread and have the right to life. In this article I will use the names “connector” and “socket”.

Connectors and power connectors

Now let's talk about the connectors that can be found on a modern power supply.

Motherboard power connector (ATX connector)

There are 20-pin and 24-pin motherboard power connectors. Farms use 24-pin ones, but for compatibility with older motherboards, the four outermost contacts are often made detachable. The type of power connector on the motherboard must match the type of power supply connector.

Motherboard power connector

In relation to mining about this connector, it can be noted that four additional contacts are used to power PCI-Express devices; they provide power up to 75 Watts.

CPU Power Connector

There are 4-pin and 8-pin connectors. From the diagram below it is easy to see that the 8-pin is two 4-pin located next to each other. Often the 8-pin is made composite, by analogy with the motherboard power connector.

CPU power connector

On power supplies, the processor power connector is located on a separate line. Sometimes there is both an 8-pin (non-separable) and a 4-pin on this line at the same time. One of them is connected to the motherboard.

PCI-E connector

It is this connector that is designed to power video cards; power supply manufacturers often make them red (and some blue) in color; there are 6-pin and 8-pin. In modern power supplies, the 8-pin can be composite, just like the connectors described earlier.

Video card power connector

The PCI-E connector is the most popular in mining. Its purpose is to provide additional power to devices (video cards, in our case) connected to the PCI-Express bus of the motherboard. According to the specifications, the 6-pin provides 75 watts of additional power, and the 8-pin provides 150 watts. At the same time, the video card receives another 75 watts from the motherboard (or from the riser).

Course on video cards for mining:

The video card may have several connectors for additional power. For example, you can take the NVIDIA GeForce GTX 980 Ti video card; its maximum power consumption, according to the manufacturers, is 250 Watts. Of this, the device receives 75 Watts from the motherboard, and connectors for at least 175 Watts are required. One 6-pin is not enough (up to 75 Watt), one 8-pin or two 6-pin (up to 150 Watt) is also not enough. Requires one 6-pin and one 8-pin (total 225 watts). Look at the picture below - that’s right, everything is correct.

Power connectors on the video card

Molex connector

Initially, this connector was designed to power hard drives and floppy drives, but currently for modern devices this function is performed by SATA connectors (about them below), and Molex connectors are used to power various additional equipment.

Molex connector

The advantage of Molex is the presence of 5 and 12 Volt lines at the same time, and a current of up to 11 Amps can flow through each line, that is, the power of a 12-Volt line is 132 Watts, and a 5-Volt line is 55 Watts. You can often find information on the Internet that Molex provides 187 watts of power. This is true, but the additional power connector for video cards has only 12 Volt lines, and the 5 Volt line is not used. In mining rigs, Molex connectors are used to connect risers, cooling fans, additional power to the motherboard, and as a replacement for missing PCI-E connectors.

Many adapters have been invented using Molex. And some of them pose a real fire hazard!

The top most fire-hazardous adapters are headed by the MOLEX->8-pin PCI-E adapter. The power consumption of the video card via the 8-pin connector, as I noted above, is up to 150 Watts. Molex is rated at 132 watts.

Do not power video cards via MOLEX->8-pin PCI-E

Molex->6-pin PCI-E and 2xMolex->8-pin PCI-E adapters should be used with caution. There is no excess in power here, but you shouldn’t relax. Adapter manufacturers often use low-quality materials - thin wires, cheap plastic, unreliable metal parts. This may also cause a fire. After installing such connectors, regularly monitor their condition.

Burn equipment because of adapters - do you need it?!

The safest option is 2xMOLEX->6-pin PCI-E adapters. A good power reserve allows you to avoid fire due to overheating, but there is still a danger of problems arising due to poor contact, as a result of which this adapter will actually turn into a 1xMolex->6-pin PCI-E, and this is the first step to big problems.

Relatively safe adapter

It is advisable to avoid using Molex adapters to connect video cards. However, it is relatively safe to use Molex connectors to power risers (let me remind you, their consumption is no more than 75 Watts), including using adapters.

SATA connector

Like MOLEX, this connector is designed for connecting hard drives and floppy drives.

SATA connector

From the diagram it can be seen that the connector has three contacts for 3.3 V, 5 V, 12 V. According to the specification, each connector is designed for a maximum current of 1.5 A. Thus, the total power of the 3.3 V lines is almost 15 Watts, 5 V lines are 22.5 Watts, and 12 V lines are 54 Watts. Thus, the maximum power of the 12 V line for this connector is three times less than that of Molex. And the 5 V lines are two times smaller.

That is, you CANNOT use SATA->Molex connectors to power devices that consume more than 50 Watts.

Dangerous! SATA->Molex

Connector for floppy drive

A real “dinosaur” is the power connector for the floppy drive. It is also called mini-molex.

Power connector for floppy

It has lines of 5 V and 12 V, each of which has a maximum current of 2 A, that is, the maximum permissible power is 10 Watts and 24 Watts, respectively. This is only enough for some kind of cooling fan.

Final figures

To make it more clear, let’s present the values ​​of the maximum permissible power consumption for lines with different voltages in the form of a table.

Table 1

The following table shows the maximum power consumption of connectors on various devices that can be part of a mining farm.

table 2

The resulting tables will allow you to determine which adapters and for what purposes are safe and which are not. For example:

• One 8-pin PCI-E to power the video card (requires 150 Watts via a 12 Volt line, Table 2) can be connected from two 6-pin PCI-Es (a total of 150 Watts via a 12 Volt line, Table 1);
• Two 6-pin PCI-E to power the video card (a total of 150 Watts required via a 12 Volt line, Table 2) can be connected from one 8-pin PCI-E (provides 150 Watts via a 12 Volt line, Table 1).
• One 6-pin PCI-E to power the video card (requires 75 Watts via 12 Volt line, Table 2) can be connected from one Molex (provides 132 Watts via 12 Volt line, Table 1), but it is better from two, given the low quality of such adapters.
• One 6-pin PCI-E to power the riser (requires 75 Watts on a 12 Volt line, Table 2) can be connected from one Molex (provides 132 Watts on a 12 Volt line, Table 1).
• Two risers with any connectors (requiring a total of 150 Watts) can be connected from one 8-pin PCI-E.

I gave these examples. But do not forget that in this matter a lot depends on the quality of the materials from which they are made. If possible, try to avoid using them.

When mining is not Fire!

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Video adapters are one of the main components of a computer. Every year they become more and more productive and require an additional source of energy, since the tasks assigned to them are no longer rendering a single 8-bit picture, but complex 3D rendering. So what types of video card power supply exist and in what cases is it necessary?

Types of video cards

Depending on the adapters, they consume different amounts of electricity. On older models, additional power for the video card was not required, since 75 W from the PCI slot itself was sufficient, and where passive cooling was used, half of this power was sufficient.

Energy consumption depends almost entirely on the type of GPU and cooling system. She may be:

1. Active - on simple coolers (1, 2 or 3 fans) and water, where liquid is used for cooling.
2. Passive - one large-volume radiator is used without any electronics. There are separate versions of quite powerful video cards with this type of cooling. But, as practice shows, such a solution cannot always cope with the assigned tasks.

How is the video card powered?

Modern video cards are powered in three ways:

• Via PCI slot. Maximum power consumption 75 W.
• 6 pin connector. Additional 75 W.
• 8 pin connector. Additionally up to

In this case, all three types of video card power can be combined or have two 6/8 pin connectors. This is necessary to power boards with a power of over 250-300 W for their stable operation, or for video cards with multiple graphics processors, which must receive energy through separate channels.

In addition to powerful flagship video cards with power like a nuclear reactor, there are adapters that have the ability to use only a PCI slot to obtain all the necessary energy. Typically, this type of connection is used by low-power and old video cards.

If someone wondered what kind of video card power supply to choose, then the answer is simple: the presence of an additional connector is present only where it is necessary. A more powerful card will always consume more power from additional sources.

Perhaps, when video adapters become multi-core or the number of processors increases, they will receive even more powerful additional power, or acquire their own power supplies, but for now a 6/8-pin connector is quite sufficient.

SLI, Crossfire and Electricity Bills

Installing several video cards in one system is a fairly common solution to improve performance, especially in cases where the second video card is available for free. NVidia and Radeon have many video cards that support parallel technology called SLI and Crossfire. This way you can connect several video cards into one powerful computing system.

The problem is that powering video cards turns into continuous consumption of huge amounts of energy. It’s good if your unit can handle this and even has enough connectors, you won’t have to buy a new one.

Some craftsmen have gone even further - they install several low-power power supplies into one system. This solution helps distribute the load across two blocks, making the assembly less busy and even reducing noise. True, this solution has some problems related to launch synchronization.

Connecting additional power

Most modern power supplies have built-in outputs for the GPU and CPU 8 pin. They are very similar to each other, but have different pinouts.

Typically, an adapter is included in the kit for the additional power supply of the video card. It is a branching of 6/8 pin contacts into two Molexes. Which, in principle, will be enough when using two 12 V channels. If the adapter was not included in the kit, then it can be purchased separately for literally pennies.

Of course, power supply through connectors that are not designed to deliver such power often leads to their burning and even failure, as well as the entire power supply. Therefore, it would be advisable to acquire a new power supply with enough power for the normal functioning of all components.

Emergency power connection

Sometimes, when buying a used video card, you may not find an 8 pin adapter included in the package. How to connect power to the video card in this case? You can try making a plug for the two remaining pins. To do this, you will need an old ATX power plug, CPU or GPU 6 pin connector. The pinout of the contacts is as follows.

In 8 pin connectors, the only difference is the presence of two GND contacts. If you try to start equipment with 8 pin from a 6 pin connector, you will receive an error about insufficient power to the video card, and, accordingly, a refusal to start.

Contacts No. 4 and 6 are not only GND, but also signal, which means you can safely power them either from another source (as an option - a Molex connector) or simply duplicate the GND channel from an already connected 6-pin connector, as in factory adapters. In theory, you can simply stick a jumper between the contacts from a reliable wire, but it doesn’t look very good, and it’s difficult to achieve stable contact.

It is important to remember that each plug has its own keys to prevent connection to other connectors. Therefore, you only need to cut off those parts that exactly fit the nest.

Connecting power to the video card in this way can help if you really understand what is happening and all the possible risks. And long-term work on such “crutches” is hardly guaranteed.

Selection of block by power

Power supplies are classified mainly by power. In the old days, 300 W of energy consumption was enough for a fairly productive computer. Now one top-end card can consume such an amount of energy, but what if there are two or, even worse, three of them installed, even if they are not the most demanding ones?

Power supplies with connectors for video cards began to be produced immediately with the release of the first video adapters that required additional power. In some power supplies you can find connectors with adapters from 6 to 8 pins, in which 2 pins are simply unfastened.

To successfully select a power supply for a video card, it would be advisable to use special calculators, of which there are quite a few on the Internet. You just need to enter the names of the components and the recommended power will be automatically selected. If you are planning future upgrades or want quieter operation, you should choose a power supply with slightly increased power - 100-150 W.