Which Of The Following Devices Use The 4-Pin Peripheral (Molex) Connector

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Source: En.wikipedia.org

Welcome to our comprehensive guide on the 4-pin peripheral connector, also known as the Molex connector. This type of connector is commonly used in various devices to provide power and connectivity. If you’ve ever wondered which devices utilize this connector, you’ve come to the right place. In this article, we will explore the different devices that make use of the 4-pin peripheral connector, as well as its function and compatibility. Whether you’re a tech enthusiast, a professional, or simply curious about the inner workings of your devices, we aim to provide you with all the information you need. So, let’s delve into the world of the 4-pin peripheral connector and discover its importance in powering the devices we use every day.

Inside This Article

  1. Hard Disk Drives
  2. Optical Drives (CD/DVD Drives)
  3. Fans and Coolers
  4. Power Supply Units
  5. Conclusion
  6. FAQs

Hard Disk Drives

Hard disk drives (HDDs) are essential components of computer systems that store and retrieve digital data. These drives use rotating magnetic disks to store vast amounts of information, ranging from operating systems and software applications to personal files and media libraries.

HDDs are known for their large storage capacities, making them ideal for users who require ample space for their data. The 4-pin peripheral connector is commonly used to power these drives, ensuring a reliable and consistent power supply.

When connecting an HDD to a power supply, you will typically find a 4-pin peripheral connector on the power cable. This connector is designed to provide the necessary power to the drive, allowing it to spin the disks and read/write data effectively.

The 4-pin peripheral connector is compatible with most HDD models available on the market today. It ensures a secure and stable power connection, reducing the risk of power interruptions that could potentially lead to data loss or drive failure.

When installing an HDD, it is crucial to ensure that the 4-pin peripheral connector is properly connected to the drive’s power input. This involves aligning the connector with the corresponding socket on the drive and firmly pushing it in until it locks into place.

It is worth noting that with the emergence of solid-state drives (SSDs), which use different power connectors, the use of the 4-pin peripheral connector for HDDs may vary depending on the specific setup. However, for traditional HDDs, this connector remains a reliable and widely-used option.

Optical Drives (CD/DVD Drives)

Optical drives, also known as CD/DVD drives, are essential components for reading and writing optical discs, such as CDs, DVDs, and Blu-ray discs. These drives rely on the 4-pin peripheral (Molex) connector to receive power from the power supply unit (PSU) and operate.

The 4-pin peripheral connector provides the necessary voltage and current to the optical drive, allowing it to spin the disc and gather data. This connector’s design ensures a secure and stable power connection, minimizing the risk of power loss or damage to the drive during operation.

CD/DVD drives are commonly found in desktop computers and older laptops. They are used to install software, play movies and music, burn data onto discs, and create backups. To connect an optical drive to the power supply unit, you can use a 4-pin peripheral connector available in most computer systems.

When installing an optical drive, it is crucial to ensure that the 4-pin peripheral connector is securely connected to the drive’s power input. The connector fits into the corresponding port on the back of the drive, providing a reliable power source for its operation.

It is worth noting that with advancements in technology, optical drives have become less common in modern laptops and even some desktop computers. Many manufacturers have started to prioritize slim and lightweight designs, sacrificing the inclusion of CD/DVD drives.

However, for those who still require the functionality of CD/DVD drives, external options are available. These external drives connect to the computer via USB and draw power from the USB port, eliminating the need for the 4-pin peripheral connector and the internal installation process.

Overall, the 4-pin peripheral (Molex) connector plays a vital role in powering optical drives, allowing users to enjoy the benefits of optical discs. Whether it’s for installing software, watching movies, or burning data, CD/DVD drives provide a versatile and convenient solution for accessing and storing information.

Fans and Coolers

Fans and coolers play a crucial role in maintaining optimal temperatures for electronic components in a computer system. The 4-pin peripheral (Molex) connector is commonly used to provide power to these essential cooling devices.

Case fans are responsible for circulating cool air into the system and expelling hot air. They often require a 4-pin peripheral connector to draw power from the power supply unit. These fans come in various sizes and designs to fit different computer cases and provide efficient cooling.

Additionally, CPU coolers, which are designed to dissipate heat generated by the processor, may also utilize the 4-pin peripheral connector for power. CPU coolers often consist of fan(s) mounted on a heatsink to provide efficient heat dissipation. The 4-pin peripheral connector ensures a stable and reliable power supply to keep the CPU temperatures in check, allowing for optimum performance.

When connecting a fan or cooler using the 4-pin peripheral connector, it is important to ensure that the connector is securely attached to both the fan or cooler and the power supply unit. This ensures that the fan or cooler receives the necessary power to function properly and effectively cool the components.

The 4-pin peripheral connector is a versatile option for powering fans and coolers. Its widespread use in computer systems makes it easy to find compatible fans and coolers that can be easily connected to the power supply unit. Whether you need extra cooling for your gaming rig or want to enhance the airflow in your system, the 4-pin peripheral connector offers a reliable and convenient solution.

Power Supply Units

A power supply unit (PSU) is an essential component of a computer system. It is responsible for converting the AC power from the wall outlet into DC power that can be used to power all the components inside the computer. The 4-pin peripheral (Molex) connector is commonly found in power supply units and is used to provide power to various components.

The 4-pin peripheral connector is a versatile connector that can be used to power a variety of devices. One of the most common uses is to provide power to IDE or DVD drives. These drives require a steady and reliable source of power to operate, and the 4-pin peripheral connector is perfect for this purpose.

In addition to powering drives, the 4-pin peripheral connector can also be used to power case fans and CPU coolers. Proper cooling is crucial for maintaining optimal performance and preventing the components from overheating. The 4-pin peripheral connector makes it easy to connect and power these cooling components, ensuring that your system stays cool and efficient.

Furthermore, the 4-pin peripheral connector is often used for powering LED lighting systems. Many computer enthusiasts like to add custom lighting to their systems to enhance aesthetics. The 4-pin peripheral connector provides a convenient way to supply power to these lighting systems, allowing users to customize and illuminate their setups to their liking.


After exploring the various devices that use the 4-pin peripheral (Molex) connector, it is clear that this versatile connector is an essential component in the world of technology. From powering computer fans and liquid cooling systems to providing additional power to graphics cards and storage devices, the Molex connector plays a vital role in ensuring optimal performance and functionality.

Its widespread use in the computer industry highlights its reliability and durability, making it a trusted choice for connecting various peripherals and devices. Whether you are building a gaming rig, upgrading your computer, or working on complex electronic projects, understanding and utilizing the 4-pin peripheral (Molex) connector will undoubtedly enhance your experience and enable smooth and seamless operations.

So, the next time you encounter a device that utilizes the 4-pin peripheral (Molex) connector, you can confidently identify its purpose and connect it with ease, knowing that you are harnessing the full potential of your technology.


1. What devices use the 4-Pin Peripheral (Molex) Connector?
The 4-Pin Peripheral (Molex) Connector is commonly used in desktop computers to provide power to various devices such as hard drives, optical drives, and fans. It can also be found in some older graphics cards and power supplies.

2. How does the 4-Pin Peripheral (Molex) Connector look like?
The 4-Pin Peripheral (Molex) Connector is a rectangular-shaped connector with four pins. It is typically white in color, but you may also find it in black or other colors depending on the manufacturer.

3. Can I use a 4-Pin Peripheral (Molex) Connector to power my SATA devices?
Yes, you can. Most power supplies come with adapters or cables that allow you to convert a 4-Pin Peripheral (Molex) Connector into SATA power connectors. These adapters usually have multiple SATA power ports, allowing you to connect multiple SATA devices using a single 4-Pin Peripheral (Molex) Connector.

4. How do I connect a device using a 4-Pin Peripheral (Molex) Connector?
To connect a device using a 4-Pin Peripheral (Molex) Connector, you need to locate the corresponding connector on your power supply. The connector on the power supply is usually labeled as “Molex” or “Peripheral.” Align the pins on the device’s connector with the corresponding holes on the power supply connector, and firmly plug it in until it clicks into place.

5. What should I do if my power supply doesn’t have a 4-Pin Peripheral (Molex) Connector?
If your power supply does not have a 4-Pin Peripheral (Molex) Connector and you need to power a device that uses this connector, you may need to use an adapter or a different power supply. Adapters can convert other types of power connectors, such as SATA or PCI-Express, into a 4-Pin Peripheral (Molex) Connector. Alternatively, you can consider using a different power supply that has the necessary connectors for your devices.