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Corsair HX1000W Review

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Environmental Factors:

A pretty heavy power supply so lost points for shipping and fuel usage, but to be fair, until technology moves on a peg or two, there isn't a lot Corsair can do to change the situation. Points lost once again for the use of foam. What this power supply does have to offer however is very good efficiency and power factor values, so a few points restored.


Price Per the Watt:

Power Supply Corsair HX1000W at $249.99 = $0.25/Watt (November 2008)


The Corsair HX1000W is so far one of the best power supplies I have tested and the only area I could find fault with is power factor at 230VAC. The feature list for the HX1000W, at least the way I read it, claims a power factor of 0.99 at all times. When supplied from 230VAC the power factor is never better than 0.96. This is really only a minor failure and will have no impact on the way the power supply performs in the real world. What the vast majority of PC users want are clean, stable DC rails and the HX1000W provides both even at 1000W.  The DC voltage load regulation and efficiency are excellent and AC ripple levels well within the ATX12V specification.

If you plan on using only one graphics card then it would be really difficult to justify using this power supply but I won't say you can't! This power supply is Nvidia SLI certified for three 9800GTX graphic cards but I feel sure it will easily power all SLI/Crossfire dual card configurations (including GX2) and most, if not all, three card configurations presently available.

The HX1000W comes with an excellent selection of cables and connectors to suit all configurations and with careful planning balancing the 12V1 and 12V2 rails should not be a problem. If you need a power supply capable of delivering 1000W of clean power then look no further. I highly recommend the Corsair HX1000W and I have no hesitation in awarding the power supply the OCC Editors Choice award.



  • Excellent DC load voltage regulation
  • Great Efficiency
  • Good DC quality
  • Three way SLI certified
  • Active power factor correction
  • MTBF: 100,000 hours
  • Good selection of connectors
  • 5 year warranty



  • Power factor at 230VAC


Editors' Choice

  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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