CORSAIR CX650 80 PLUS Bronze Non Modular Low-Noise ATX 650 Watt Power Supply - U vs JUSTOP Black 750W PSU

Brand Overview

When choosing a power supply unit (PSU), the brand can often influence consumer trust and reliability. The CORSAIR CX650 is produced by Corsair, a well-known brand in the gaming and PC hardware industry, recognised for its high-quality components. On the other hand, the JUSTOP Black 750W PSU comes from JUSTOP, a lesser-known manufacturer that has been gaining traction for providing budget-friendly options. While Corsair has a reputation for performance and durability, JUSTOP aims to offer a competitive price point, priced at £32.95 compared to the Corsair’s £44.99.

Power Output Comparison

Power output is crucial when selecting a power supply, as it directly affects your system's performance. The CORSAIR CX650 delivers 650 Watts, which is sufficient for most mid-range gaming setups. In contrast, the JUSTOP Black PSU offers a higher output of 750 Watts. This makes the JUSTOP a more powerful option, providing extra headroom for future upgrades or demanding components. The difference of 100 Watts could be significant for users planning to run high-performance graphics cards or multiple drives.

Efficiency Ratings

Efficiency is a vital factor in energy consumption and heat generation. The CORSAIR CX650 is rated as 80 PLUS Bronze certified, which guarantees up to 88% operational efficiency. This high efficiency not only translates to lower energy costs but also reduces heat output, contributing to a quieter system. Conversely, the JUSTOP PSU does not mention a specific efficiency rating, which could imply lower efficiency compared to the CORSAIR. Thus, users prioritising energy savings may find the CORSAIR more appealing.

Cooling Solutions

Effective cooling is essential for maintaining performance and longevity in power supplies. The CORSAIR CX650 features a 120mm thermally controlled low-noise fan that adjusts its speed based on the load, ensuring quieter operation under lower loads. In contrast, the JUSTOP Black PSU also includes a 120mm cooling fan, but there are no specifics on its noise or operational control. Users desiring a quieter computing experience may prefer the CORSAIR’s advanced cooling system, which reduces noise during less demanding tasks.

Size and Compatibility

The physical size of a PSU can impact its compatibility with various PC cases. The CORSAIR CX650 is designed with a compact casing of 125mm in length, ensuring it fits in most modern PC cases without issues. On the other hand, the JUSTOP PSU does not specify its dimensions, which could raise concerns about compatibility. For users with tight spaces in their builds, the compact design of the CORSAIR offers a clear advantage.

Safety Features

Safety features are paramount when selecting a power supply, as they protect both the unit and connected components. The CORSAIR CX650 includes a range of protections but does not detail them explicitly. In contrast, the JUSTOP Black PSU lists multiple safety features, including over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection. This makes the JUSTOP a potentially safer option for users concerned about power surges and stability, even though the specific protections of the CORSAIR are not detailed.

Connectivity Options

Connectivity options can greatly affect how many components can be powered and how easy installation is. The JUSTOP Black PSU includes a range of connectors: 1x 24-Pin (20+4), 1x 8-Pin 12V (4+4), 6x SATA, 1x 4-Pin Molex, and 1x 8-Pin PCI-E (6+2). These connections provide ample flexibility for connecting various components. In comparison, the CORSAIR CX650’s specific connector details are not provided. For users with multiple drives and components, the JUSTOP may offer more comprehensive connectivity.

Which should you buy?

In conclusion, both the CORSAIR CX650 and the JUSTOP Black 750W PSU have their unique strengths. The CORSAIR CX650 is a reliable option with its 80 PLUS Bronze certification, low-noise cooling, and compact design, making it suitable for users focusing on efficiency and noise reduction. Conversely, the JUSTOP Black PSU stands out with its higher wattage output, a variety of safety features, and lower price point of £32.95, making it an attractive choice for budget-conscious consumers needing more power. Ultimately, the decision rests on whether you prioritise efficiency and brand reputation or power output and cost savings.