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Seasonic PRIME 650W Platinum PSU Review

The Seasonic PRIME 650W Platinum is another fantastic power supply from a company who can do very little wrong in recent years. The build quality is exemplary and technically it is difficult to find fault with this unit.

Load regulation is stellar and the power supply exhibited no issues when dealing with the intensive cross load test. Ripple suppression is also noteworthy and we recorded a >94% peak efficiency. Thanks to the adoption of a high grade FDB fan noise levels are never a concern, which is important.

On an appearance level, the Platinum range of power supplies are finished in a plain black, whereas the more expensive Titanium units have a silver plate around the fan which adds a little bit of pizazz to the proceedings.

Seasonic have not cut corners by adopting cheaper Chinese components – they tend to use Nippon Chemi Con Japanese 105c caps in all their units, and the 650W Platinum is no different. By recently raising their warranty from 10 years to 12 years, they have also made a public statement about the quality of their units, and how long they are standing by each product.

While the Platinum 650 Watt power supply is undoubtedly impressive, reviewing this product has raised a somewhat interesting point for me. Last year I reviewed the Seasonic PRIME 650 watt Titanium and at the time I really didn't notice just how much they had over specified the unit.

The two primary stage Nippon Chemi Con capacitors in the Platinum model reviewed today deliver a total of 440uF. The Titanium model has two significantly larger capacitors which can output 900uF. The Titanium model could actually output almost 850 watts before switching off, while this Platinum version was closer to 720 watts before shut down. This means that the capacitors in the Titanium unit are running at a much lower percentage of capacity under identical load conditions, which likely is helping improve the overall proficiency of the power delivery and ripple suppression.

As listed on Overclockers UK, you pay £30 extra for the more proficient Titanium 650W PRIME unit, and while the Platinum unit delivers the goods, I would likely spend the extra £30 myself for the class leading Titanium unit.

Buy the Seasonic PRIME 650 Watt Platinum power supply from Overclockers UK for £154.99 HERE.

Buy the Seasonic PRIME 650 Watt Titanium power supply from Overclockers UK for £184.99 HERE.

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Pros:

  • 12 year warranty.
  • technically solid.
  • quiet under load.
  • fully modular.
  • high quality finish.
  • 105c Japanese capacitors.
  • ripple suppression and load regulation rate highly.

Cons:

  • expensive.
  • Falls some way short of the slightly more expensive Titanium 650W.

KitGuru says: The Seasonic PRIME 650W Platinum is another great power supply from a company who can do no wrong lately. It does fall a little short when compared directly to the more expensive PRIME 650W Titanium unit however.

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Rating: 8.5.

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