Cooler Master V850 SFX Gold vs JUSTOP Black 650W PSU

Price Comparison

When it comes to price, the difference between the Cooler Master V850 SFX Gold and the JUSTOP Black 650W PSU is substantial. The Cooler Master V850 SFX Gold is priced at £134.56, making it a premium option in the power supply market. In stark contrast, the JUSTOP Black 650W PSU is remarkably more affordable at just £29.99. This significant disparity of over £100 may appeal to budget-conscious consumers, but it’s essential to evaluate what each product offers for its price.

Power Output

The Cooler Master V850 SFX Gold provides a robust output of 850 watts, catering to high-performance systems that require more power. This makes it particularly suitable for users with demanding components such as high-end graphics cards. On the other hand, the JUSTOP Black 650W PSU, with its 650-watt output, is designed for standard desktop PCs that may not require as much power. This means that while the JUSTOP may suffice for everyday use, those looking for more power efficiency and capability will find the Cooler Master to be the better option.

Efficiency Ratings

Efficiency is a critical factor when selecting a power supply, and here the Cooler Master V850 SFX Gold excels with its 80 PLUS Gold certification. This rating signifies that it operates at 90% efficiency under typical loading conditions, which translates to lower electricity bills and reduced heat generation—an important consideration for compact builds. In contrast, the JUSTOP Black PSU does not mention an efficiency rating. While it features power factor control, the lack of a specific efficiency certification may suggest it is less optimal in energy consumption compared to the Cooler Master.

Design and Form Factor

The Cooler Master V850 SFX Gold is specifically engineered for small form factor (SFF) cases, with dimensions of 100 x 125 x 63.5 mm, making it an excellent choice for mini-ITX builds. It also includes an SFX-to-ATX bracket for compatibility with ATX cases. The JUSTOP Black 650W PSU, being a standard ATX power supply, is larger but is designed to fit a wider range of cases. Buyers should consider their specific case requirements, as those with SFF cases will benefit from the more compact design of the Cooler Master.

Modular Cabling

In terms of cable management, the Cooler Master V850 SFX Gold offers a fully modular cabling system. This feature allows users to connect only the cables they need, improving airflow and reducing clutter inside the case. It includes various connectors such as ATX 24 Pin, EPS 4+4, and multiple PCI-e connections. Conversely, the JUSTOP Black 650W PSU, while offering essential connectors, does not specify a modular design. This may lead to more clutter in the case, potentially affecting airflow and aesthetics, especially in compact builds.

Cooling Solutions

Cooling is paramount in ensuring the longevity and performance of a power supply. The Cooler Master V850 SFX Gold utilises a 92mm fluid dynamic bearing fan. This fan is designed to minimise noise and temperature, and it even features a semi-fanless mode for operation under light loads. On the other hand, the JUSTOP Black PSU is equipped with a 120mm cooling fan, which may provide effective cooling for its power output. However, without specific details about its noise levels or efficiency, it is challenging to compare directly with the Cooler Master’s advanced cooling technology.

Warranty and Reliability

The Cooler Master V850 SFX Gold is built with high-quality components, including 100% Japanese capacitors, and comes with an impressive 10-year warranty. This extended warranty reflects the manufacturer's confidence in the product's durability and reliability. In contrast, the JUSTOP Black PSU does not specify a warranty period. For consumers prioritising longevity and reliability in their investment, the Cooler Master offers peace of mind that the JUSTOP may not.

Which should you buy?

Ultimately, the choice between the Cooler Master V850 SFX Gold and the JUSTOP Black 650W PSU hinges on your specific needs and budget. If you require a high-efficiency, compact power supply with premium features and durability, the Cooler Master V850 SFX Gold, despite its higher price, is a worthy investment. However, if you are looking for a budget-friendly option for a standard desktop PC, the JUSTOP Black 650W PSU may serve your needs adequately. Assess your power requirements, case compatibility, and budget before making your decision.