CORSAIR RPS0021 Atx Power Supply VS400 CP9020117 400W

( Brand: Corsair ), ( Manufacturer Part Number: RPS0021 ), ( Model: VS400 ), ( Compatible Brand: Universal ), ( Cooling: 1 Fan ), ( Color: Black ), ( Connectors: 24 Pin ), ( Form Factor: Atx ), ( Type: Power Module ), ( Maximum Power: 400 W ), ( Unit Type: Unit )

Review CORSAIR Atx Power Supply Tested

Corsair RM450x and CP-9020117 CX400, A Comparison of Two Reliable 400W ATX Power Supplies

Corsair, a renowned name in the PC component market, offers a variety of power supplies to cater to different system requirements. In this comparison, we will delve into the features and specifications of the Corsair RM450x and the CX400, both 400W ATX power supplies, to help you make an informed decision based on your needs.

The Corsair RM450x is a high-performance, 80 Gold certified power supply. It boasts a fully modular design, which allows users to connect only the cables they need, reducing clutter and improving airflow. The RM450x features a quiet, 135mm fluid dynamic bearing fan, which ensures efficient cooling while maintaining a low noise level. This power supply also includes a single 12V rail, capable of delivering up to 35A, providing stable power for modern components.

The Corsair CX400 is an entry-level, semi-modular power supply, also 80 Bronze certified. It comes with a multi-rail design, delivering power to different components through separate rails. The CX400 features a 120mm double ball-bearing fan, which provides sufficient cooling for the power supply. Although not as quiet as the RM450x, this fan ensures reliable and efficient operation.

Both power supplies offer 400W of power, making them suitable for mid-range systems. The RM450x, however, is fully modular, providing users with greater flexibility and a cleaner build. It also boasts a quieter fan and a single 12V rail, delivering more stable power. On the other hand, the CX400 is a more budget-friendly option with a semi-modular design and a less quiet fan.

In conclusion, the Corsair RM450x and CX400 are both reliable power supplies, catering to different user preferences and budgets. The RM450x is an excellent choice for those seeking a clean build, stable power, and quiet operation. Meanwhile, the CX400 is a more affordable option for those building on a tighter budget, offering solid performance with a semi-modular design. Ultimately, the decision between these two power supplies depends on your specific system requirements and personal preferences.

The Corsair RM450x (CP-9020148-NA) and Corsair CX400 (CP-9020117-NA), both 400W ATX power supplies, offer different balance of features, performance, and price. Here's a breakdown of their pros and cons to help you make an informed decision.

1. High-quality components for improved reliability and longevity.

2. Fully modular design for easier cable management.

3. Quiet operation due to RR (Recognized as a Quiet) certified fan.

4. 80 Gold efficiency for better power conversion and less waste heat.

5. Overvoltage and overcurrent protection.

1. Higher price point compared to CX400.

2. Fewer connectors for peripherals, focusing on motherboard and graphics card connections.

1. Affordable price point for a reliable power supply.

2. Decent performance and efficiency (80 Bronze).

3. Semi-modular design for easier cable management than a non-modular PSU.

1. Less efficient than the RM450x (80 Bronze vs 80 Gold).

2. Louder operation due to a less efficient fan.

3. Fewer connectors than the RM450x.

In conclusion, the Corsair RM450x (CP-9020148-NA) is a more expensive but higher-performing and more efficient choice, offering a quieter operation and better component quality for improved reliability and longevity. The Corsair CX400 (CP-9020117-NA), on the other hand, is an affordable option with decent performance and efficiency, making it a solid choice for budget-conscious builders who don't mind the louder operation and fewer connectors.

If your budget allows and you value quiet operation, high efficiency, and component quality, the Corsair RM450x (CP-9020148-NA) is the recommended choice. However, if you're on a tight budget, the Corsair CX400 (CP-9020117-NA) remains a reliable and decent performing option.

Details:

With a maximum power output of 400W and cooling system featuring one fan, this black ATX supply is compatible with universal range brands offers single outlet for easy connectivity. The Corsair VS400 RPS0021 CP9020117 400W ATX Power Supply is a reliable and efficient power module designed for computers networking devices. Tested for quality and performance, the Corsair VS400 is a solid choice ensuring stable consistent power delivery to your PC or other electronic devices.

part #: rps0021 prices

• $19.40-$49.95

specifications powsuppy:

• brand: Corsair
• mpn: Rps0021
• model: Vs400
• compatible brand: Universal
• cooling: 1 Fan
• color: Black
• connectors: 24 Pin
• form factor: Atx
• type: Power Module
• maximum power: 400 W
• unit type: Unit

offer powsuppy:

• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock
• started: January 12, 2026

seller powsuppy:

• city: Baltimore, Maryland
• # reviews: 10147
• rating: 100.0%

returns powsuppy:

• paid by: Buyer
• policy: Returns Accepted
• method: Money back
• time: 30 Days

general powsuppy:

• Computers/Tablet's Networking > Computer Components Parts > Power Supplies
• condition: Used

shipping powsuppy:

• transit: 3-9 Days
• service: USPS First Class, USPS Priority Mail, FedEx Standard Overnight
• carrier: USPS, FedEx
• class: Standard, Expedited, One-day
• cost: $0.00
• type: Calculated

payments powsuppy:

• wallet: Apple-pay
• other
• credit card: Diners-club

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