Do You Need Both 8 Pin & 4 Pin Cables For CPU? (Explained!)

Many times it has been seen that some motherboards have a 4-pin connector for CPUs, and some motherboards have an 8-pin connector for CPUs. So which cable do you need?

Depending on your motherboard’s specifications, it will either accept a single 4-pin, a single 8-pin, both 8-pin & 4-pin or dual 8-pins. The low-end & old motherboards need a single 4-pin connector, but the modern motherboards accept a single 8-pin connector.

What CPU connector you need primarily depends on a couple of factors, like the number of connectors the motherboard has, the CPU’s power consumption, and whether you are overclocking or not.

By the conclusion of this article, you will have a clear understanding of which CPU connector is necessary and how many CPU connectors are required.

Difference Between A 4-Pin & 8-Pin CPU Cable

The old power supplies mostly come with a 4-pin CPU connector because old CPUs doesnt require a lot of power. But modern CPUs are overclockable and require lots of power to function smoothly.

That’s why modern Power Supplies mostly come with multiple 8-pin CPU connectors, which can be split into 4+4 pins. So you won’t face any issues while installing newer or older CPUs.

4 Pin Cable For CPU8 Pin Cable For CPU
The 4 Pin connector for the CPU is known as the P4 connectorThe 8-pin connector for the CPU is known as the EPS connector.
The 4 Pin connector can supply a maximum power of up to 155 wattsThe 8 Pin CPU connector can supply power up to 235 Watts.
The low-end CPUs with a TDP under 155W need the 4-pin P4 connector.The high-end CPUs with a TDP higher than 155W need the 8-pin EPS connector.

This table explains the difference between the 4-pin and 8-pin CPU cables; now, we will understand when we need which cables.

When Do You Need 4 Pin & 8-Pin CPU Connector?

As explained, the low-end affordable CPUs require less than 155 watts of power; therefore, the 4 Pin connector is sufficient for these CPUs.

On the other hand, the high-end overclockable CPUs require higher than 155 watts of power, and you need the 8-pin EPS connector for these CPUs.

It is recommended to check your CPU’s power requirement before using the CPU connector because you may need both 4 Pin and 8 Pin connectors in certain cases.

Consider the example of the Intel Core i9 13900K processor, which has a maximum power consumption of up to 253 watts. Therefore, a single 4-pin or 8-pin connector alone cannot provide the required power for this CPU.

Using the Intel Core i9 13900K processor in conjunction with the MSI MAG Z690 Tomahawk WIFI motherboard requires two 8-pin EPS connectors from your Power Supply to supply the necessary power

Don’t get confused between the 8 Pin CPU and 8 Pin GPU cables; both cables are different. This article helps you to figure out the differences between CPU and GPU cables.

The CPU pin connector requirements vary among different motherboards, and based on this variation, you can determine the number of necessary CPU connectors.

How To Check Whether You Need A 4-Pin or 8-Pin CPU Cable?

You can easily identify whether you need a 4-pin, 8-pin, or both cables by checking the specifications of your motherboard. To figure out this, follow the given steps-

Check your motherboard model or chipset- Search about that model on google- Go to the manufacturer’s website- Click on the detail or specification tab- Scroll the page to the internal connector section and check what type and how many connectors your CPU requires.

Let’s understand this entire process by checking an example-

My system has the A320M-A PRO MAX motherboard, and I searched about this model on google and visited MSI’s official website.

After that, I go to the specifications tab


Then I scrolled the page, checked the internal connector section, and found that my CPU will need one 4 Pin P4 connector.

This is how we can easily figure out how many CPU connectors are needed by checking the motherboard specifications.

PSU Doesn’t Have 8 Pin For The CPU: What To Do?

The modern Power Supplies comes with 8 Pin EPS cable for the CPU, which can be split into 4+4 pin connectors. But, some old and cheap Power Supplies doesnt come with 8-pin EPS cables for CPUs.

If your Power Supply doesnt have the 8-pin connector, then you can use the ATX 4-pin to motherboard CPU 8-pin adapters. You have to plug the female side of this cable into your PSU’s 4-pin CPU male connector.

The opposite end will go to the motherboard’s 8-pin CPU slot. Check out the most sold out 2 Pack COMeap ATX 4 Pin to motherboard CPU 8-pin adapter.

Some motherboards have one 8-pin and one 4-pin connector requirement, and in this kind of scenario, if the PSU doesnt have any of these connectors, then we can use CPU 8-pin female to CPU ATX 8-pin and 4-pin male adapters.

You have to plug the female 8-pin side of this adapter into your PSU’s 8-pin EPS cable, and the opposite ends of the adapters will go to the motherboard’s 8 Pins and 4 Pins slots.

Check out the EPS12V CPU 8 Pin Female to CPU ATX 8 Pin and ATX 4 Pin Male Power Supply Extension Cable on Amazon.

Do not try to overclock your CPUs by using these adapters and with a 4 Pin connector because it can cause system instability issues. If you are going to overclock your CPUs, buy a good power supply with sufficient CPU cables.

Can You Plug An 8 Pin Into A 4 Pin?

Modern Power Supplies mostly come with the 8 Pin EPS cable for the CPU slot, and this connector can be split into two 4-pin+ 4-pin connectors.

So, it is definitely possible to use the 8 Pin EPS cable on 4 pin CPU slot by splitting the cables.

Can You Use A 4 pin in an 8-Pin Slot?

NO! Using a 4-pin connector in 8 pin CPU slot on the motherboard is not recommended because both cables carry different wattages. The 4-pin connector can supply up to 155W, and the 8-pin connector can supply up to 235W.

If your motherboard has an 8-pin CPU connector, that indicates the CPU requires more than 155W to run. In such a scenario, if we use only 4 pin connector, then the CPU will not get the required power.

In most cases, the computer will not start, and if it starts, then you will face system instability issues.


The entire article explains that the low-end CPUs require 4-pin cables, high-end CPUs require 8-pin cables, and the overclockable CPUs require both cables. You must check the motherboard’s specifications to determine exactly which type and how many connectors your CPU needs.

I hope this article clears all your doubts regarding the 4-pin CPU connector and 8-pin CPU connector; if you have any queries, then ask me in the comment box.

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Hii, My name is Pallab Mitra, founder of this blog. I am a PC tech enthusiast, and I will share my PC knowledge with you guys in this blog. Read More- About Me 

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