SEASONIC SS400-ET Atx Switching Power Supply 400W

( Brand: Seasonic ), ( Manufacturer Part Number: SS400-ET ), ( Type: Switching Power Supply ), ( Outputvoltage Amps: A V ), ( R2 Condition: Tested For Key Functions, Ready For Resale )

Review SEASONIC Atx Switching Power Supply

The Seasonic SS-400ET is a high-performance ATX switching power supply unit (PSU) with a capacity of 400 watts. This PSU is designed for use in mid-tower computer systems and delivers reliable power to components while maintaining exceptional efficiency.

The SS-400ET features a 120mm double ball fan, which ensures quiet operation and long-term durability. The fan speed is controlled by an advanced fan control circuit, which adjusts the fan speed based on the temperature and load of the components, providing optimal cooling performance while minimizing noise.

This power supply unit utilizes a single 12V rail design, which delivers a steady and consistent power output to the motherboard and other high-power components. The SS-400ET also includes a wide range of protective features, including over-current protection, over-voltage protection, under-voltage protection, and short-circuit protection, ensuring the safety of the components in your system.

The Seasonic SS-400ET is 80 PLUS Bronze certified, meaning it meets the minimum energy efficiency guidelines set by the 80 PLUS organization. This certification ensures that the PSU converts at least 82% of the input power into output power under typical load conditions, resulting in energy savings and reduced heat generation.

The PSU comes with a modular cable design, allowing users to only connect the cables they need, reducing clutter and improving airflow within the case. The cables are also fully sleeved, giving the system a clean and professional look.

The Seasonic SS-400ET is built with high-quality components and is backed by a 5-year warranty, providing peace of mind and ensuring reliable performance for years to come. With its efficient design, quiet operation, and robust protective features, the Seasonic SS-400ET is an excellent choice for any mid-tower computer system.

The Seasonic SGX-400 ET ATX Switching Power Supply 400W is a reliable and efficient power supply unit (PSU) that caters to mid-range systems. Here are some pros and cons to help you make an informed decision before making a purchase:

1. High Efficiency: The Seasonic SGX-400 ET PSU operates at an impressive 80 Plus Gold efficiency level, meaning it converts up to 90% of the input power into usable output power. This results in reduced energy waste, lower operating temperatures, and cost savings in the long run.

2. Quiet Operation: The fan of this PSU is designed to operate at low noise levels, even under full load. This makes it an excellent choice for users who prioritize quiet operation in their systems.

3. Fully Modular Design: This power supply features a fully modular design, which means that each cable can be connected or disconnected as needed. This simplifies cable management and allows for easier installation and upgrades, as only the necessary cables need to be connected.

4. High-Quality Components: Seasonic is known for using only the finest components in their power supplies. The SGX-400 ET is no exception, as it features Japanese capacitors, which are renowned for their long life and stability.

5. Protections and Safety Features: The power supply comes equipped with various protections and safety features, such as over-voltage protection, under-voltage protection, short-circuit protection, and over-temperature protection. These features help ensure the longevity and stability of your system.

1. Price: The Seasonic SGX-400 ET is a more expensive option compared to other power supplies in its class. However, the added features, such as high efficiency, quiet operation, and fully modular design, may justify the additional cost for some users.

2. Size: With dimensions of 140 mm x 86 mm x 140 mm (W x H x D), the power supply may not be the most compact option available. If space is a concern, consider measuring the available space in your case before making a purchase.

3. No USB 3.0 Connections: Some users may prefer a PSU with USB 3.0 connections for faster data transfer. However, most modern motherboards come with integrated USB 3.0 headers, so this may not be a significant drawback for many users.

The Seasonic SGX-400 ET ATX Switching Power Supply 400W is an excellent choice for users who prioritize high efficiency, quiet operation, and a fully modular design in their power supplies. Although it comes with a higher price tag, the benefits it offers may justify the investment for those who require a reliable and feature-rich power supply for their systems. Ultimately, the decision to purchase this power supply depends on your specific needs and budget. If you can afford the additional cost and the size fits in your case, the Seasonic SGX-400 ET is a solid investment that is sure to serve you well.

If you're in the market for a high-performance, quiet, and efficient power supply, the Seasonic SGX-400 ET ATX Switching Power Supply 400W is a strong contender that is worth considering. Its reliable build quality, excellent efficiency, and fully modular design make it a wise investment for any mid-range system. However, it's essential to ensure that the size fits in your case and that the price aligns with your budget before making the final decision.

Details:

Items Included / Notes If it is not pictured, probably included. SEASONIC Manufacturer Item Condition This item has been Tested for Key Functions, Ready Resale. TBF Item ID: 116664. SEASONIC SS400-ET ATX Switching Power Supply 400W.

Power Requirements: requires a standard computer power cord, included, Input voltage : 100-240 volt, Item will have 4 x2 internal inventory label, see pictures. Approx Shipping Weight and Dimensions: lbs: 6. 10.00 x 8.00 inches.

part #: ss400 prices

• $35.00-$101.26

specifications powsuppy:

• brand: Seasonic
• mpn: Ss400-et
• type: Switching Power Supply
• outputvoltage amps: A V
• r2 condition: Tested For Key Functions, Ready For Resale

general powsuppy:

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

shipping powsuppy:

• service: USPS First Class, FedEx Ground / FedEx Home Delivery, FedEx Standard Overnight
• transit: 3-8 Days
• class: Standard, One-day
• cost: $23.05
• carrier: USPS, FedEx
• type: Calculated

payments powsuppy:

• other
• wallet: Paypal
• credit card: Diners-club

returns powsuppy:

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

seller powsuppy:

• # reviews: 57731
• rating: 99.7%
• city: Marietta, Georgia

offer powsuppy:

• sold: 0
• best offers: True
• options: Ship-to-home
• started: May 26, 2026
• availability: In Stock
• quantity: 1

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