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In Win Commander 850W Power Supply Review

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Environmental Factors:

On the plus side, no foam along with good efficiency and consistently high power factor all help the environment. If, as suggested by In Win, you keep the box to put all your treasure in, then that's one less discarded cardboard box. I've got to say it, this is probably one of the greenest power supplies I have tested!


Price Per the Watt:

Power Supply In Win Commander 850W at $199.99 = $0.24/Watt (December 2008)


The In Win Commander 850W got off to a great start with excellent DC voltage load regulation and very commendable efficiency, but what really lets it down is the high ripple/noise level present on the 12V rail. In Win have not tried to hide this fact and it states a maximum value of 240mV in the power supply specification, which means the Commander 850W does not meet the ATX12V V2.2 specification of 120mV maximum.

I mentioned earlier that the board used in the In Win Commander 850W is almost identical (upgraded heatsinks being the only obvious change but there could be others) to the board used in the Corsair TX750W, and I can't help but feel that In Win have attempted to drive it a little harder than its design specification. The board is built by CWT and screen printing on the printed circuit board shows the board is used for multiple power supply designs from 350W to 750W, but not 850W. This would go some way toward explaining the excessive noise levels on the 12V rails, and slightly elevated temperatures along with the high RPM of the fan at full load.

The box lid shows an Nvidia SLI ready logo, but the In Win brand is not currently listed, in any section, as an Nvidia certified device at the time of writing this review. I have no doubt it will easily power any existing dual configuration, but it isn't certified.

The results for the In Win Commander 850W are a little dissapointing, especially the high ripple/noise level on the 12V rails. It comes with a good selection of modular cables and accessories and I have no doubt its military themed design will appeal to some people. Noise aside, the power supply does perform quite well, so I have no hesitation in recommending this power supply for use on any system running at stock frequencies for CPU and GPU.  The high noise level will not prove to be a problem in this case. Overclocked systems require solid and stable rails, and for this reason I find it difficult to recommend the In Win Commander 850W for use by the overclocking enthuiast when better performing power supplies are currently available at a similar or better price.



  • Excellent DC voltage load regulation
  • High efficiency
  • Active PFC
  • MTBF>120,000 hours
  • 3 year warranty
  • Good selection of connectors



  • 80 Plus certification not quite met
  • Noise/ripple on 12V rail higher than allowed by the ATX12V V2.2 specification
  • Noisy fan at full load


  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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