Final Thoughts and Conclusions

Like all it’s X-Series predecessors, the new Seasonic Platinum 660W power supply incorporates significant advances in PC power supply design that result in excellent performance, high efficiency and the ability to operate in silent-fanless mode at lower power levels.  Add to that a 7-year warranty, a good assortment of all modular cables, tight voltage regulation, clean DC outputs and you have one very good power supply!  However, as you might expect, a premium Platinum efficiency certified PSU is going to be relatively expensive.

The Seasonic Platinum 660W power supply is currently selling for $149.99 USD (, December 2012).

• Outstanding voltage regulation
• Excellent efficiency across a broad range of loads (80Plus Platinum certified)
• Very low AC ripple even at 100% load
• Silent, fanless operation at lower power levels
• Quiet operation at mid to upper power levels
• Single +12V output can deliver up to 55A/660W
• Four PCI-E connectors (6/8-pin) and two 4+4 pin/8-pin ATX/EPS
• 7-Year warranty
• Active PFC with universal AC input
• All modular, flat ribbon-style cables with gold-plated connectors

Minor Weaknesses:
• Platinum efficiency costs a little more

Seasonic Platinum Series 660W PSU

I would like to thank our friends at Seasonic for sending us the Platinum 660W PSU to review – thank you!

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