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What is PSU cable?

Author

Mia Phillips

Updated on February 23, 2026

What is PSU cable?

A power supply unit (or PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. While an ATX power supply is connected to the mains supply, it always provides a 5 Volt standby (5VSB) voltage so that the standby functions on the computer and certain peripherals are powered.

Accordingly, what cables do I need for PSU?

Power Cables

  • 24-pin power to motherboard (always required)
  • 4/8-pin EPS12V power to CPU (always required)
  • 6/8-pin power to video card (normally required)
  • SATA power to storage devices (normally required)
  • MOLEX power to accessories (optional)
  • CPU fan & case fan power (required)

Likewise, are all PSU cables the same? PSU CABLE COMPATIBILITY. Disclaimer: The only difference between Type 3 and Type 4 cables is the pinout of the 24-pin ATX cable; all other cables (SATA, PCIe, etc) are the same.

Simply so, can I use any power cable for PSU?

Any cable will work. A 1,000W power supply (80% efficient) will pull about 10 amps at full load. That's well within the specs of any of those cables. Some compaines do sell heavier duty cables, with larger wires in them, but there's no need in this case.

What is a Type 4 PSU cable?

The Type 4 cables have the same pin-out as Type 3 cables, but include small, solid capacitors on the +12V, +5V and +3.3V leads on the 24-pin, PCIe and EPS12V cables.

Why does USB 3.0 need power cable?

Adoption of USB 3.0 could bring an end to interfaces that use serial ports like e-SATA, which, while fast, require an additional power cable. USB 3.0 features an extra set of pins that creates a faster data bus capable of supporting real-world speeds of between 3.2 and 4 gigabits per second.

What does the PSU plug into?

Next, you have to connect the internal power cables from your new power supply to the rest of your computer. Plug the 24-pin power connector into your motherboard first, then go for the 4 or 8-pin CPU power connector. Plug in the optical drives, SSDs, and hard drives.

How do you remove PSU cables?

There's a little tab on the plastic connector that must be pinched in order to remove the cable from the board. It should be on the outside-facing side of the connector (towards the outside edge of the board). Squeeze/pinch that, and gently pull on the plastic connector - not the wires.

What is a SATA cable?

SATA. Stands for "Serial Advanced Technology Attachment," or "Serial ATA." It is an interface used to connect ATA hard drives to a computer's motherboard. They also use smaller, thinner cables, which allows for better airflow inside the computer.

How many cables does a motherboard have from the PSU?

The primary task of the Power Supply Unit (PSU) is to provide your motherboard with power. This is done via the 20-pins or 24-pins connector. A 24-pins cable is backwards compatible with a 20-pins motherboard, often this cable can be split into 20- and 4-pins (like in the image above).

How many Molex connectors does a PSU have?

6 molex connectors

Are power supply cables universal?

There is no universal standard for modular PSU output cables.

How many SATA cables do I need?

You would require two SATA cables as you have one CD drive and one HDD drive.By the way, there are two types of SATA cables- With lock/clip and without lock/clip(Sometimes called 'Generic'). Both would work.

How big of a power supply do I need?

For example, if the maximum power or combined TDP (total design power) of your system's present components is 300 watts, a 600-watt PSU would be a good fit. In a high-end system loaded with components that may peak collectively at 700 watts, a 1200-watt PSU would work well.

What needs to be plugged into the motherboard?

Some fans with a four-pin connector can attach directly to the motherboard, but others need to be plugged into a power supply rail. You may need molex adapters or SATA adapters if you have more than two or three fans, but generally the power supply comes with enough extra cables for most basic builds.

Does PSU cable matter?

They're just cables. Some might be of higher quality than others (especially higher power units). Those don't matter. They all have to end the same, but each psu can output them in different order, since they are sorted by the wiring of the cable.

Does the power supply matter?

Efficiency matters with a PSU
Efficiency is important because it affects how much you'll spend on keeping your PC juiced up. As an example, consider a PC that requires 300 watts of power. A power supply that's only 70% efficient, on the other hand, will pull 428 watts of power from the wall.

Can I use a 12v power supply on a 5v?

If you are talking about an ac adapter, then using a 9V or 12V adapter where 5V is required is not a good idea. 6V is only 20% off. I would not chance it but it might work.

Are PSU extension cables safe?

Extensions will be plugged into the standard modular cables and not the PSU. Usually that´s safe for using. Replacements are specifically for the chosen unit and not for others, because the modular outputs of power supplies are usually different from manufacturer to manufacturer.

Are all 3 prong power cords the same?

Re: Are most 3-prong amp cords interchangeable? For the most part, yes. If a manufacturer ships an amp with an especially beefy cord (i.e., heavy gauge), it's probably best to use that cable, or another one of similar gauge.

Do monitors come with power cables?

Yes, monitors require the power cables that come with them. HDMI can be many sizes from maybe 3' to 6 or 10.

What voltage is a ps3 power cord?

As seen in the table below, the PS3 takes 100V-240V AC (with exception of APS-227, LSEB1226B1 and LSEB1254A1) at various amps (A) from your power socket, and converts this to two DC (Direct Current) voltages of 12V, and 5V (or 5.5V for later PS3 models) at various amps.

Can I use a 125v cord on a 250v?

You can always use a power cord that is rated at a higher voltage than the maximum required by your setup. Your original cord was rated at 10A, 125V. The one you found is also rated at 10A, and it will handes 250V, twice the voltage it will actually encounter. Bottom line - You should be good to go with the new cord.

Are all HP printer power cords the same?

The most necessary aspect of a printer power adapter to know is not all printer power adapters are interchangeable. The power adapter from one printer may not work with another printer. There are two general basic kinds of printer power cord.

What is a modular PSU?

Simply put, a modular PSU allows the builder to attach (or detach) cables as they're needed. Traditional power supplies, on the other hand, have the cables attached permanently to the PSU. The downside to having removable cables is that the cables themselves generally use proprietary arrangements and connectors.

Are all SATA cables the same?

The same cables and connectors used for current SATA implementations can be used to connect SATA 6Gb/s devices. You can see that all the cables have the same gauge of signal wire, although the Asus SATA 6Gb/s and the Intel SATA 3Gb/s both have an additional ground wire.

What are PCIe cables for?

PCI Express (PCIe) 6pin power. This connector is used to provide extra 12 volt power to PCI Express expansion cards. Many video cards draw significantly more than 75 watts provided by the motherboard slot, so the 6 pin PCI Express power cable was created. These are sometimes called “PCI Express cables”.

What is Molex for?

Certain Molex connectors are used for providing power to the motherboard, fans, floppy disk drive, CD/DVD drive, video card, some older hard drive models, and more. Compatible connectors are available from many manufacturers, not just Molex and AMP.

Are EVGA PSU cables interchangeable?

Yes they are interchangeable between all Supernova power supplies. The only difference it the 1300W and 1000W PSU's use a 28-pin motherboard connector on the PSU end.

What is the voltage and use of the yellow wire?

These are the same for all ATX power supplies: 3.3V wires are orange; +5V wires are red; -5V wires (if they are present) are white; +12V wires are yellow; -12V wires are blue; ground wires are black. The green wire is the "power on" sensor. This wire is internally connected to 5V with a pull-up resistor.

What is the brain of the computer?

The computer brain is a microprocessor called the central processing unit (CPU). The CPU is a chip containing millions of tiny transistors.

Are Corsair PSU cables interchangeable?

No, they aren't interchangeable, the AX1200i uses the Type 3 Gen 2 cables.

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