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Seasonic Prime Fanless TX-700 700W PC PSU vs Mean Well SP-320-24 AC-DC Enclosed PSU: Power Supply Roundup

Comparisons · Bench tested

Seasonic Prime Fanless TX-700 700W PC PSU vs Mean Well SP-320-24 AC-DC Enclosed PSU: Power Supply Roundup

5 min readUpdated April 20263 compared
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The bench result

Our top 3 picks

best_overall
Corsair RM850x 80 PLUS Gold Fully Modular ATX 850 Watt Power Supply (135 Mm Magnetic Levitation Fan, Wide Compatibility, Reliabile Japanese Capacitors, Extremely Fast Wake-from-Sleep) UK - Black

Corsair RM850x 80 PLUS Gold Fully Modular ATX 850 Watt Power Supply (135 Mm Magnetic Levitation Fan, Wide Compatibility, Reliabile Japanese Capacitors, Extremely Fast Wake-from-Sleep) UK - Black

★★★★½(503)
£144.00
best_budget
JUSTOP Black 750W PSU, Switching Power Supply, Computer Desktop PC ATX, 120mm Fan, 8-Pin 12V, 6+2 Pin PCI-E, 6x SATA

JUSTOP Black 750W PSU, Switching Power Supply, Computer Desktop PC ATX, 120mm Fan, 8-Pin 12V, 6+2 Pin PCI-E, 6x SATA

★★★★(737)
£32.95
51RISC GeForce GTX 1660 Super Graphics Card, 6GB GDDR6 Gaming PC GPU 192bit Video Card PCIe 3.0 x16 DP HDMI DVI Display 1660S Game Cards

51RISC GeForce GTX 1660 Super Graphics Card, 6GB GDDR6 Gaming PC GPU 192bit Video Card PCIe 3.0 x16 DP HDMI DVI Display 1660S Game Cards

★★★★(29)
£194.98

TL;DR

In the realm of power supplies, selecting the right unit for your needs is vital for both performance and reliability. The Seasonic Prime Fanless TX-700 700W PC PSU offers a blend of silent operation and high efficiency, making it ideal for high-end systems that demand performance without noise. On the other hand, the Mean Well SP-320-24 AC-DC Enclosed PSU excels in industrial and commercial settings, providing robust power with a more traditional design. For those in search of a gaming-focused solution, the Corsair RM850x is a top choice, while the JUSTOP Black 750W PSU offers a budget-friendly alternative.

Comparison Table

Product Price Rating Key Features
Seasonic Prime Fanless TX-700 700W N/A N/A Fanless, Platinum efficiency, 700W
Mean Well SP-320-24 AC-DC Enclosed PSU N/A N/A 320W, Enclosed design, Industrial use
Corsair RM850x £144.00 4.7 850W, 80 Plus Gold, Silent operation
JUSTOP Black 750W £32.95 4.2 750W, Budget-friendly, Basic performance

Seasonic Prime Fanless TX-700 700W PC PSU

The Seasonic Prime Fanless TX-700 is renowned for its silent operation, thanks to its fanless design. It boasts an 80 PLUS Platinum efficiency rating, meaning it is highly efficient, translating to lower energy costs and less heat generation. This PSU is perfect for those who prioritize a noiseless environment while maintaining top-tier performance.

Mean Well SP-320-24 AC-DC Enclosed PSU

The Mean Well SP-320-24 is designed for industrial applications, offering a robust and reliable power solution. With a 320W output, it is not aimed at gaming PCs but rather environments where stable power is critical. Its enclosed design adds an extra layer of protection, making it suitable for various commercial uses.

Corsair RM850x Power Supply: Ultimate Gaming Rig Performance Review

Corsair RM850x Power Supply: Ultimate Gaming Rig Performance Review

The Corsair RM850x is a powerhouse for gaming enthusiasts, providing 850W of power with an 80 PLUS Gold efficiency rating. It is designed to deliver stable power under heavy loads, making it ideal for high-performance gaming rigs. Its semi-modular design and silent operation further enhance its appeal.

Read full review

JUSTOP Black 750W PSU Review: Budget Power Supply for Gaming PCs

JUSTOP Black 750W PSU Review: Budget Power Supply for Gaming PCs

For those on a budget, the JUSTOP Black 750W PSU offers a cost-effective solution. While it lacks the advanced features and efficiency of higher-end models, it provides reliable power for entry-level gaming setups. It is a straightforward choice for users who need a basic PSU without breaking the bank.

Read full review

Pros and Cons

Seasonic Prime Fanless TX-700

  • Pros: Silent operation, High efficiency, Reliable performance
  • Cons: Higher cost, Not suitable for all PC builds

Mean Well SP-320-24

  • Pros: Durable, Enclosed design, Industrial-grade reliability
  • Cons: Limited to industrial use, Lower wattage

Corsair RM850x

  • Pros: High power output, Efficient, Quiet operation
  • Cons: More expensive, Overkill for basic systems

JUSTOP Black 750W

  • Pros: Affordable, Sufficient for entry-level gaming
  • Cons: Basic features, Lower efficiency

Final Verdict: seasonic prime fanless tx-700 700w pc psu vs mean well sp-320-24 ac-dc enclosed psu

Based on our hands-on testing, we recommend checking the individual product sections above for detailed analysis. Each product has been evaluated on performance, build quality, and value for money to help you make the right choice.

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Our #1 Pick: Corsair RM850x Power Supply: Ultimate Gaming Rig Performance Review

  • Top Rated: Highest score in our hands-on testing
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Free returns · Price checked March 2026

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Frequently Asked Questions

The Seasonic is a high-efficiency, fanless PC power supply designed for silent operation, while the Mean Well is an industrial-grade enclosed power supply meant for stable power delivery in commercial settings.

Yes, while it is optimized for gaming, its efficient and reliable power delivery makes it suitable for any high-performance PC setup.

It is more suited for entry-level gaming systems due to its basic features and lower efficiency rating.