SUN PRO Atx Power Supply Pin KY-400ATX 400W

( Brand: Sun Pro ), ( Manufacturer Part Number: KY400ATX ), ( Maximum Power: 400 W ), ( Connectors: 20 4 Pin ), ( Form Factor: Atx ), ( Compatible Brand: Universal ), ( Voltage Compatibility: 110v / 220v ), ( Type: Power Supply ), ( Unit Type: Unit ), ( Color: Gray )

Review SUN PRO Atx Power Supply Tested Working Pin

The Sunpro Ky-400ATX is a high-performance 400-watt ATX power supply designed to deliver reliable and efficient power to your computer system. This power supply features an advanced design with a 120mm double ball fan for enhanced cooling and quiet operation. With 20-pin ATX connectors, it is compatible with a wide range of modern desktop computers.

The Sunpro Ky-400ATX power supply is built with high-quality components and advanced circuitry to ensure stable voltage and low ripple levels. It offers over-voltage, under-voltage, and short-circuit protection to safeguard your system from potential damage. The 4 4-pin EPS12V connector ensures compatibility with the latest Intel and AMD processors.

This power supply is 80 PLUS certified, meaning it meets the highest energy efficiency standards. It converts 80% or more of the input energy into output power, reducing energy waste and saving you money on electricity bills. The Sunpro Ky-400ATX also features active PFC (Power Factor Correction) technology, which ensures a constant power output and reduces harmonic distortion.

The Sunpro Ky-400ATX power supply is also modular, allowing you to only use the cables that you need. This reduces clutter inside your computer case and makes cable management easier. The cables are also sleeved, giving your system a clean and professional look.

The Sunpro Ky-400ATX power supply is a reliable and efficient choice for powering your desktop computer. With its advanced features, high compatibility, and quiet operation, it is an excellent investment for any PC enthusiast or professional user.

Pros and Cons of buying a Sunpower Ky-400ATX 400W ATX Power Supply

a. High Power Efficiency: With an 80 Bronze certification, this power supply converts up to 82% of the input energy into usable power for the computer, reducing energy waste and saving on electricity bills.

b. Reliable: Sunpower is a reputable brand known for manufacturing high-quality power supplies. This model, the Ky-400ATX, is no exception.

c. Quiet Operation: The Ky-400ATX uses a quiet 120mm fan for cooling, ensuring a peaceful computing environment.

d. Multiple Safety Protections: The power supply comes with various safety features like over-voltage, under-voltage, over-current, short-circuit, and over-temperature protection, safeguarding your system from potential harm.

a. Limited Modularity: This power supply only comes with a semi-modular design, meaning only the 24-pin ATX and EPS12V cables are modular. Other cables are fixed, which might limit cable management and create clutter in larger builds.

b. Size: The Ky-400ATX is a larger power supply, measuring 150mm (L) x 86.7mm (W) x 140mm (H), which might not fit in smaller PC cases.

c. Fan Noise: While the fan is quiet during normal operation, it can get loud when under heavy load, which might be a concern for some users.

The Sunpower Ky-400ATX 400W ATX power supply offers several advantages, including high power efficiency, reliability, quiet operation, and multiple safety protections. However, it has some drawbacks, such as limited modularity, size, and fan noise under heavy load.

After considering the pros and cons, if you're looking for a power supply with a strong brand reputation, high power efficiency, and reliable safety features, the Sunpower Ky-400ATX could be an excellent choice. However, if you prioritize a quieter operation, a more modular design, or a smaller size, you might need to consider other options.

If the Ky-400ATX doesn't fit your specific requirements, I would recommend exploring other power supplies based on your priorities. For instance, if you're looking for a quieter power supply, consider the EVGA SuperNOVA 550 G5, which comes with a fan that operates at very low speeds even under light load. Alternatively, if modularity is a priority, the Corsair RMx Series RM550x could be a good option.

Details:

voltage readings are shown in the photos. Includes only the power supply as shown in photos. Photos are part of the. Please review photos carefully before purchase.

Cosmetic condition shows normal signs of use such as minor scuffs and wear. Unit powers on and has been tested with a multi meter. Used Sun Pro ATX power supply, model KY-400ATX.

part #: ky400atx prices

• $16.37-$190.00

specifications powsuppy:

• brand: Sun Pro
• mpn: Ky400atx
• maximum power: 400 W
• connectors: 20 4 Pin
• form factor: Atx
• compatible brand: Universal
• voltage compatibility: 110v / 220v
• type: Power Supply
• unit type: Unit
• color: Gray

general powsuppy:

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

offer powsuppy:

• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 8, 2026
• availability: In Stock

payments powsuppy:

• money order
• wallet: Paypal
• other
• credit card: Mastercard

returns powsuppy:

• policy: No Returns

shipping powsuppy:

• type: Calculated
• class: Economy, Standard, Expedited
• transit: 5-10 Days
• cost: $11.00
• service: FedEx Ground Economy, USPS Ground Advantage, USPS Priority Mail
• carrier: FedEx, USPS

seller powsuppy:

• city: Naples, Florida
• rating: 100.0%
• # reviews: 99

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