JUSTOP Black 750W PSU vs Raspberry Pi 27W USB-C Power Supply - Black

Power Output and Capacity

The JUSTOP Black 750W PSU delivers a significantly higher power output compared to the Raspberry Pi 27W USB-C Power Supply. Specifically, the JUSTOP PSU provides 750 watts of power, whereas the Raspberry Pi supply offers a maximum output of 27 watts. This vast difference in capacity reflects their intended uses: the JUSTOP is designed for powering desktop PCs with multiple components, while the Raspberry Pi supply is tailored for small single-board computers and low-power devices. The 750W capacity of the JUSTOP PSU supports heavy-duty systems requiring stable and substantial power, contrasting sharply with the modest 27W supply of the Raspberry Pi, which is suitable for compact, energy-efficient electronics.

Connector Types and Compatibility

Connector compatibility is a key differentiator between these two power supplies. The JUSTOP Black 750W PSU is equipped with a variety of connectors including a 24-Pin (20+4) main connector, an 8-Pin 12V (4+4) connector, six SATA connectors, a 4-Pin Molex, and an 8-Pin PCI-E (6+2) connector. This broad range allows it to support multiple PC components such as motherboards, graphics cards, and storage devices. In contrast, the Raspberry Pi 27W USB-C Power Supply has a single USB-C connector, suitable for powering Raspberry Pi devices and other USB-C compatible electronics. Its 1.2m cable length and 18awg wire gauge optimise it for compact, portable use but limit its compatibility to USB-C devices only.

Safety Features and Certifications

Safety is well addressed by the JUSTOP Black 750W PSU, which includes power factor control (PFC), over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection. Additionally, it carries multiple safety agency approvals including UKCA, CE, FCC, UL, and TUV Electrical Safety Certification, indicating compliance with stringent international safety standards. The Raspberry Pi 27W USB-C Power Supply does not list specific safety features or certifications in the provided information, which suggests it relies on standard power supply compliance but lacks the extensive protections and certifications of the JUSTOP PSU. This makes the JUSTOP PSU a safer choice for high-demand and sensitive PC components.

Voltage and Current Specifications

The voltage and current output capabilities differ notably between the two products. The Raspberry Pi 27W USB-C Power Supply offers multiple output voltage levels: 5.1V at 5A, 9V at 3A, 12V at 2.25A, and 15V at 1.8A, enabling it to adapt to various USB Power Delivery profiles. This versatility suits a range of small devices beyond the Raspberry Pi itself. Conversely, the JUSTOP Black 750W PSU operates on a single 12V rail, supplied through an 8-pin (4+4) connector, designed for stable and consistent power delivery to desktop PC components. This single voltage rail approach is standard in PC power supplies, ensuring reliability for demanding system parts.

Price and Value Considerations

The Raspberry Pi 27W USB-C Power Supply costs £14.87, making it a budget-friendly option for users needing a reliable, low-power supply. In comparison, the JUSTOP Black 750W PSU is priced at £32.95, reflecting its higher power capacity, more extensive connectors, and safety certifications. Although more than twice the price, the JUSTOP PSU offers value for users with desktop PCs requiring up to 750W of stable power and comprehensive protection features. For those seeking a simple, low-cost power source for USB-C devices, the Raspberry Pi supply provides solid value at a lower price point.

Cooling and Noise Management

The JUSTOP Black 750W PSU incorporates a 120mm cooling fan, which assists in maintaining optimal operating temperatures and preventing thermal overload. This feature is crucial for high-capacity power supplies operating in desktop PC environments where heat dissipation is a concern. The Raspberry Pi 27W USB-C Power Supply, designed for low power delivery, does not mention any active cooling solutions, relying instead on its lower wattage and efficient design to manage heat passively. This difference underscores the JUSTOP PSU’s suitability for high-demand scenarios versus the Raspberry Pi supply’s focus on compactness and simplicity.

Intended Usage and Target Devices

The JUSTOP Black 750W PSU is clearly intended for desktop PCs, as indicated by its ATX form factor and multiple connectors tailored for motherboards, PCI-E devices, and storage drives. Its features and certifications support its role as a stable and safe power source for complex computer builds. Meanwhile, the Raspberry Pi 27W USB-C Power Supply targets Raspberry Pi devices and similar USB-C powered electronics, offering multiple voltage options to accommodate various small gadgets. This focus on low-power, portable devices contrasts with the JUSTOP’s desktop-centric design, making each supply ideally suited to very different applications.

Which should you buy?

Choosing between the JUSTOP Black 750W PSU and the Raspberry Pi 27W USB-C Power Supply depends primarily on your power needs and device type. For desktop PC users requiring up to 750W with multiple connectors and comprehensive safety features, the JUSTOP PSU at £32.95 is the clear choice. Its 120mm cooling fan and certification suite add to its reliability for demanding systems. Conversely, if you need a compact, affordable power supply for Raspberry Pi or other USB-C devices, the Raspberry Pi 27W supply at £14.87 offers adaptable voltage outputs and portability, making it ideal for lightweight applications. Ultimately, select the JUSTOP PSU for high power and safety in PC setups, and the Raspberry Pi supply for low-power USB-C devices.