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CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX vs Thermaltake Smart 500W 80+ White Certified PSU,

Updated July 2026 — CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX wins on output and width, Thermaltake Smart 500W 80+ White Certified PSU, wins on length.

The CORSAIR CX550 offers superior efficiency and build quality, while the Thermaltake Smart 500W is a budget-friendly option. Choose based on your priorities.

Why CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX is better

Efficiency

CORSAIR CX550 has 88% efficiency compared to 80% for Thermaltake.

Power Delivery

CORSAIR CX550 delivers 550W continuous power versus 500W for Thermaltake.

Build Quality

CORSAIR CX550 features a premium design with black sleeved cables.

Why Thermaltake Smart 500W 80+ White Certified PSU, is better

Price

Thermaltake Smart 500W is $39.99, significantly cheaper than CORSAIR.

Warranty

Thermaltake offers a 5-year warranty compared to 3 years for CORSAIR.

Noise Level

Both have low noise, but Thermaltake is designed for excellent airflow.

Overall score

CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX
85
Thermaltake Smart 500W 80+ White Certified PSU,
70

Specifications

SpecCORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATXThermaltake Smart 500W 80+ White Certified PSU,
Efficiency88%80%
Power Output550W500W
Warranty3 years5 years
Cooling Fan120mm120mm
Certification80 PLUS Bronze80 PLUS White

Dimension comparison

CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATXThermaltake Smart 500W 80+ White Certified PSU,

Introduction

When it comes to choosing a power supply for your PC, two popular options are the CORSAIR CX550 and the Thermaltake Smart 500W. The CORSAIR CX550, priced at $65.99, boasts an 80 PLUS Bronze certification, while the Thermaltake Smart 500W is available for $39.99 and offers 80 PLUS White certification. These differences in efficiency and pricing set the stage for a detailed comparison.

Efficiency and Certification

The CORSAIR CX550 is an 80 PLUS Bronze certified power supply, which means it operates at up to 88% efficiency. This high efficiency not only reduces heat generation but also lowers energy costs over time. In contrast, the Thermaltake Smart 500W is 80 PLUS certified with an efficiency rating of around 80%. While both units are efficient, the CORSAIR CX550 stands out with a 10% higher efficiency rating, which can lead to significant savings on energy bills in the long run.

Continuous Power Delivery

In terms of power delivery, the CORSAIR CX550 guarantees full continuous power at 550 watts, ensuring reliable performance even under heavy loads. The Thermaltake Smart 500W, on the other hand, delivers 500 watts of continuous output at a temperature of plus 40 degrees Celsius. While the Thermaltake model is still adequate for many builds, the CORSAIR's higher wattage may be beneficial for users with more demanding systems or additional components.

Cooling Performance

Cooling is essential for maintaining optimal performance in any power supply. The CORSAIR CX550 features a 120mm thermally controlled low-noise cooling fan that operates quietly, spinning faster only during heavy loads. This design minimizes noise during regular use. The Thermaltake Smart 500W also comes equipped with a 120mm cooling fan that delivers excellent airflow at low noise levels. However, the CORSAIR's advanced thermal control may provide a more efficient cooling solution under varying load conditions.

Build Quality and Components

Build quality is a crucial factor when selecting a power supply, as it impacts reliability and longevity. The CORSAIR CX550 is designed with black sleeved cables and a black powder-coated casing, which not only enhances aesthetics but also contributes to durability. Additionally, it comes with a three-year warranty. In comparison, the Thermaltake Smart 500W is constructed with high-quality components and includes a five-year warranty, potentially offering more peace of mind in terms of longevity. However, the CX550's focus on efficiency and aesthetics may appeal more to those looking for a premium feel.

Compatibility

Compatibility with various systems is another important consideration. The CORSAIR CX550's compact 125mm length ensures it can fit in almost all modern PC cases, making it a versatile choice for builders with different setups. The Thermaltake Smart 500W is also designed to comply with Intel ATX 12 Volt 2.31 and EPS 12V 2.92 standards, making it suitable for a wide range of builds as well. Both power supplies offer good compatibility; however, the CORSAIR's compact design may provide an edge in tighter spaces.

Pricing and Value

Price can significantly influence purchasing decisions. The CORSAIR CX550 is priced at $65.99, while the Thermaltake Smart 500W is notably cheaper at $39.99, making it about 17% less expensive. This lower price point makes the Thermaltake an attractive option for budget-conscious consumers. However, potential buyers should weigh the cost against the benefits of better efficiency, continuous power, and build quality in the CORSAIR model.

User Experience and Support

User experience is often shaped by the support provided by the manufacturer. The CORSAIR CX550 offers the reassurance of a three-year warranty and access to CORSAIR's global technical support, ensuring help is available when needed. The Thermaltake Smart 500W, with its five-year warranty, also provides a solid support structure. However, some users may prefer the dedicated technical assistance that comes with the CORSAIR brand, known for its customer service and reliability.

Which should you buy?

Choosing between the CORSAIR CX550 and the Thermaltake Smart 500W ultimately depends on your specific needs and budget. If you prioritize efficiency, continuous power delivery, and build quality, the CORSAIR CX550 is the superior choice despite its higher price of $65.99. On the other hand, if you are looking for a budget-friendly option without sacrificing necessary features, the Thermaltake Smart 500W at $39.99 offers solid performance and a longer warranty. Thus, your decision should be based on whether you value efficiency and premium features over cost.