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The Seasonic X-Series 850W power supply is just as impressive as the 1250W model which we reviewed a couple of weeks ago. That said, an 850W Power supply makes a lot more sense for a much wider audience, especially as this unit can handle an extended load of 1,000 watts. Not often have we tested an 850W power supply that can sustain a 1,000W load.
Aesthetically we like the appearance of the X-Series 850W. The black paint is deep and difficult to scratch, although it does attract finger prints fairly easily.
The plain black appearance will suit a broad range of systems and we prefer the subdued black fan grill, compared against the bright gold version on the 1250W model.
Technically there are no weaknesses with this design. It delivers high levels of efficiency while maintaining strong noise suppression. The +12V output peaks at 30mV under full load and +3.3V/+5V peak at 15 mV under the same conditions.
The high grade Sanyo Denki San Ace fan is generally inactive below 450W, kicking in harder in the last 200W of total rated output.
The modular design is excellent and Seasonic supply a plethora of high grade sleeved cables which are long enough to be compatible with a tower design chassis.
I was slightly disappointed that the power supply has only 4 PCI E 6/8 pin connectors and cables. With the high level of power output and strong regulation, we feel another two cables could have been added without forcing a reliance on adapters.
We have no hesitations recommending this power supply, it is available from ARIA for £150 inc vat. An ideal choice for an ultra high end enthusiast gaming system.
Pros:
- Excellent build quality.
- Modular design.
- quiet, quality fan.
- efficient.
- stable load regulation.
- can deliver over 1,000Watts!
Cons:
- expensive.
- only 4 PCI E connectors.
Kitguru says: Another winning design from Seasonic.
