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CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX vs POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11

Updated August 2026 — CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX wins on power and efficiency, POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11 wins on price and compatibility.

The CORSAIR CX550 excels in power output and efficiency, making it the better choice for demanding builds, while the POINWER H240AS-01 is a budget-friendly option for specific Dell systems.

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

Power Output

550 watts vs 240 watts

Efficiency

80 PLUS Bronze certification

Noise Levels

Low-noise operation

Why POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11 is better

Price

$30.36 vs $65.99

Installation

User-friendly installation process

Compatibility

Designed for Dell OptiPlex systems

Overall score

CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX
85
POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11
60

Specifications

SpecCORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATXPOINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11
Wattage550W240W
Efficiency Rating80 PLUS BronzeN/A
Cooling Fan120mm low-noiseStandard
Warranty3 yearsN/A
Form FactorATXSFF

Dimension comparison

CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATXPOINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11

Overview of the Power Supplies

When considering power supplies, the CORSAIR CX550 and POINWER H240AS-01 are two distinct options catering to different needs. The CORSAIR CX550 offers higher wattage and efficiency, while the POINWER H240AS-01 is specifically designed for small form factor Dell OptiPlex systems. With the CORSAIR priced at $65.99 and the POINWER at $30.36, potential buyers should assess their specific requirements before making a choice.

Power Output and Efficiency

One of the most significant differences between these two power supplies is their power output and efficiency. The CORSAIR CX550 boasts a substantial 550 watts of power with an 80 PLUS Bronze certification, meaning it provides up to 88% operational efficiency. This efficiency not only reduces heat generation but also lowers energy costs. In contrast, the POINWER H240AS-01 offers a lower output of 240 watts, which is suitable for its intended small form factor systems. This results in about a 56% difference in power output, making the CORSAIR a better choice for more demanding setups.

Compatibility and Use Case

The CORSAIR CX550 is designed for a wide range of modern PC builds, ensuring compatibility with almost all cases thanks to its compact 125mm length. On the other hand, the POINWER H240AS-01 is specifically compatible with various Dell OptiPlex models, including the 390, 790, and 990, emphasizing its niche market. This makes the POINWER ideal for users looking to replace a power supply in existing Dell systems, while the CORSAIR is more versatile for custom builds.

Noise Levels

Noise levels can significantly impact the user experience, especially in quiet environments. The CORSAIR CX550 features a low-noise 120mm thermally controlled fan that only ramps up under heavy load, enabling quieter operation during light usage. This design is beneficial for users who prioritize a silent computing experience. In contrast, the POINWER H240AS-01 does not specifically mention noise levels in its features, which may indicate a standard fan operation that could be louder under load. Therefore, users sensitive to noise may prefer the CORSAIR.

Installation and Ease of Use

Ease of installation is crucial, particularly for those who may not be technically inclined. The POINWER H240AS-01 claims effortless installation with a user-friendly process that enables replacement in just three simple steps. This is particularly appealing for users of Dell OptiPlex systems who may not have extensive technical knowledge. The CORSAIR CX550, while also designed for straightforward installation, does not emphasize this aspect as strongly, although its design is compatible with most modern cases.

Build Quality and Testing

The POINWER H240AS-01 stands out with its rigorous testing procedures, which include high and low voltage tests, aging tests, and load testing to ensure reliability and safety. Such stringent quality checks enhance the confidence in product performance. While the CORSAIR CX550 is known for its durability and comes with a three-year warranty, it does not provide detailed information about specific testing methods. The detailed testing approach of the POINWER may appeal to users who prioritize reliability in their power supplies.

Price Comparison

The price point is an essential factor in deciding between the two power supplies. The CORSAIR CX550 is priced at $65.99, while the POINWER H240AS-01 is significantly cheaper at $30.36. This means the POINWER is approximately 54% less expensive than the CORSAIR. However, this lower price comes with trade-offs in power output and efficiency, which could be critical depending on your build requirements. Users must consider whether they need higher performance, which justifies the additional cost of the CORSAIR.

Which should you buy?

In conclusion, choosing between the CORSAIR CX550 and the POINWER H240AS-01 boils down to your specific needs. If you require a higher wattage, efficiency, and lower noise operation for a custom build, the CORSAIR is the superior choice. However, if you are looking for a budget-friendly option for a Dell OptiPlex system and prefer ease of installation, the POINWER offers solid value. Ultimately, your decision should align with the requirements of your system and your budgetary constraints.