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CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply vs ESGAMING SFX 500W / Mini ITX/Micro ATX

Updated August 2026The CORSAIR RM1000x is the superior choice for high performance and efficiency, while the ESGAMING SFX is a budget-friendly option for basic needs.

The CORSAIR RM1000x is the superior choice for high performance and efficiency, while the ESGAMING SFX is a budget-friendly option for basic needs.

Why CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply is better

Power Output

CORSAIR offers 1000W compared to ESGAMING's 500W.

Efficiency

CORSAIR has a Cybenetics Gold certification for up to 91% efficiency.

Modularity

CORSAIR is fully modular, allowing for better cable management.

Why ESGAMING SFX 500W / Mini ITX/Micro ATX is better

Price

ESGAMING is significantly cheaper at C$54.99.

Size

ESGAMING is compact, suitable for Mini ITX builds.

Basic Features

ESGAMING provides essential connectors for basic setups.

Overall score

CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply
90
ESGAMING SFX 500W / Mini ITX/Micro ATX
60

Specifications

SpecCORSAIR RM1000x Fully Modular Low-Noise ATX Power SupplyESGAMING SFX 500W / Mini ITX/Micro ATX
BrandCorsairESGAMING
Form FactorATXSFX
Fan SizeN/A80mm
ProtectionN/AHeavy-duty
Connector TypeFully ModularPartially Modular

Dimension comparison

CORSAIR RM1000x Fully Modular Low-Noise ATX Power SupplyESGAMING SFX 500W / Mini ITX/Micro ATX

Price Comparison

When considering the price, the CORSAIR RM1000x is significantly more expensive than the ESGAMING SFX. Priced at C$224.98, the CORSAIR model is aimed at users seeking high performance and reliability, particularly for demanding builds. In contrast, the ESGAMING SFX is priced at a much more budget-friendly C$54.99, making it an attractive option for entry-level or casual users. This stark difference in price reflects the varying features and capabilities of each power supply, catering to different segments of the market.

Power Output

The power output is another crucial factor where the two models diverge significantly. The CORSAIR RM1000x boasts a robust 1000W capacity, suitable for power-hungry systems and high-end graphics cards. This capacity is ideal for gamers or professionals who require substantial power for their setups. On the other hand, the ESGAMING SFX offers a more modest 500W output, which is adequate for basic Mini ITX or Micro ATX builds. This difference highlights the RM1000x's suitability for demanding users while the ESGAMING SFX caters to those with lower power requirements.

Efficiency Ratings

In terms of efficiency, the CORSAIR RM1000x stands out with a Cybenetics Gold certification that ensures up to 91% efficiency. This high rating translates into lower power consumption, reduced noise, and cooler operational temperatures, making it an excellent choice for users concerned about energy efficiency and long-term costs. Conversely, while the ESGAMING SFX features an Active PFC design aimed at improving efficiency, specific efficiency ratings are not provided. However, it does promise reduced energy waste and better performance under fluctuating power conditions, appealing to casual users.

Modularity

Modularity is another area where the CORSAIR RM1000x excels. It is fully modular, allowing users to connect only the cables they need for their systems. This feature not only makes installation easier but also contributes to better airflow within the case. The ESGAMING SFX, while not fully modular, does offer some flexibility with its connectors, including the ability to split the 24-pin motherboard connector into a 20+4pin configuration. However, it lacks the level of customisation and ease of use that comes with the full modularity of the RM1000x.

Compatibility with Modern Standards

The CORSAIR RM1000x is ATX 3.1 compliant, supporting the latest PCIe 5.1 standard and ensuring compatibility with cutting-edge graphics cards. This compliance is crucial for users looking to future-proof their builds. In contrast, while the ESGAMING SFX provides essential connectors for various components, it does not explicitly mention compliance with any modern standards like ATX 3.1. This difference may influence users who are keen on utilising the latest technology and components in their systems.

Cooling Solutions

Cooling is essential for maintaining optimal performance and longevity in power supplies. The CORSAIR RM1000x features advanced design elements aimed at reducing noise and enhancing cooling efficiency. Its construction ensures lower operational temperatures, a significant advantage for high-performance setups. The ESGAMING SFX, on the other hand, includes an 80mm silent fan that is thermally controlled, providing adequate cooling for its 500W output. While it may be sufficient for less demanding systems, it does not match the cooling capabilities of the more powerful RM1000x.

Build Quality and Durability

Build quality and durability are paramount in power supplies, and the CORSAIR RM1000x is designed with high-performance components that ensure longevity and reliability. Its robust features, such as embossed cables with low-profile combs, contribute to a sleek and durable construction. The ESGAMING SFX, while offering heavy-duty protections against various electrical issues, may not match the overall high-end build quality of the RM1000x. Users seeking a power supply that can withstand the test of time may find the CORSAIR model more appealing.

Which should you buy?

In conclusion, the choice between the CORSAIR RM1000x and the ESGAMING SFX largely depends on your specific needs and budget. If you are looking for high power output, superior efficiency, and modular design tailored for advanced gaming or professional use, the CORSAIR RM1000x is the clear winner at C$224.98. However, if you are on a tight budget and require a reliable power supply for a basic build, the ESGAMING SFX at C$54.99 is an excellent choice, providing essential features without breaking the bank. Ultimately, your decision should reflect your performance requirements and financial constraints.

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CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply vs ESGAMING SFX 500W / Mini ITX/Micro ATX | versusfinder