CORSAIR SF850 vs CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX 550 Watt Power Supply - N

Price Comparison

When it comes to pricing, the CORSAIR SF850 is significantly more expensive than the CORSAIR CX550. The SF850 is priced at C$279.99, while the CX550 comes in at a budget-friendly C$84.99. This price difference reflects the features and capabilities of each power supply. The SF850 is designed for high-performance systems, offering a Platinum rating and advanced technology suitable for demanding applications, whereas the CX550 provides solid performance for everyday use at a more accessible price point.

Efficiency Ratings

The efficiency ratings between the two products highlight a substantial difference in performance. The CORSAIR SF850 is 80 PLUS Platinum rated, which means it operates at an efficiency of up to 92%. This high efficiency reduces wasted energy and translates into lower electricity bills in the long run. In contrast, the CORSAIR CX550 is 80 PLUS Bronze certified, providing up to 88% efficiency. While still efficient, it will generate slightly more heat and consume more power compared to the SF850, making the latter more suitable for high-demand tasks.

Form Factor and Compatibility

The form factor and compatibility of each power supply are crucial for users with specific build requirements. The CORSAIR SF850 is an SFX form-factor unit, making it ideal for compact builds where space is at a premium. Its design allows for flexibility in cable management, which is essential for maintaining clean aesthetics in small cases. On the other hand, the CORSAIR CX550 is an ATX power supply with a compact length of 125mm, ensuring it fits in almost all modern PC cases. While the CX550 is versatile, the SF850's SFX form factor caters to niche markets focused on miniaturization.

Cooling Solutions

In terms of cooling solutions, the two power supplies employ different technologies to maintain performance. The CORSAIR SF850 features a 92mm PWM cooling fan that is designed for low-noise operation thanks to its fluid dynamic bearing. This design allows it to provide powerful cooling without generating excessive noise, which is an important consideration for silent builds. In contrast, the CORSAIR CX550 uses a 120mm thermally controlled low-noise fan that only spins at high speeds when under heavy loads. This means it can operate quietly during regular use, but may be slightly noisier than the SF850 during peak demand.

Build Quality and Reliability

Build quality is a notable aspect when comparing these two power supplies. The CORSAIR SF850 is equipped with 105°C rated Japanese capacitors, which are known for their reliability and longevity under high-stress conditions. This makes the SF850 a robust choice for high-performance systems where power stability is critical. Conversely, the CORSAIR CX550 offers full continuous power delivery, ensuring it can meet its rated wattage consistently. While it may not have the same high-end components as the SF850, it still provides dependable performance for standard usage scenarios.

Aesthetic Design

Aesthetic design can also influence a buyer's decision, especially in custom builds. The CORSAIR SF850 boasts a sleek and compact design, making it a visually appealing option for those who prioritise style in their builds. Its fully modular cables contribute to a tidy appearance, reducing clutter and enhancing airflow within the case. The CORSAIR CX550, on the other hand, features black sleeving and a black powder-coated casing that seamlessly fits into most PC styles. While both units offer a clean look, the SF850's modularity gives it an edge in terms of customisation and organisation.

Target Audience

The target audience for the CORSAIR SF850 and the CORSAIR CX550 differs considerably. The SF850 is aimed at high-performance users who need a reliable power supply for demanding applications, such as gaming or content creation, where efficiency and reliability are paramount. At C$279.99, it is an investment for serious enthusiasts. Meanwhile, the CX550 targets budget-conscious consumers who require a dependable power supply for everyday computing tasks. Priced at C$84.99, it serves well for standard builds that do not require the advanced features of the SF850.

Which should you buy?

Choosing between the CORSAIR SF850 and the CORSAIR CX550 ultimately depends on your specific needs and budget. If you are building a high-performance system that demands efficiency, reliability, and compact design, the SF850 is the way to go despite its higher price of C$279.99. However, if you are looking for a reliable power supply for everyday tasks at a more affordable price of C$84.99, the CX550 provides excellent value without compromising on essential features. Consider your performance requirements and budget carefully to make the best decision for your build.