Reviews - Corsair RM850 850W
Sample Provided by: Corsair (By OklahomaWolf on Mon, Jan-13-2014)

Page 6 - Scoring

Performance (40% of the final score) - it's that time again - scoring time. This power supply did very well here. First, we saw a clean pass for Gold efficiency in both cold and hot tests. No deduction from a perfect score for that. Next, voltage regulation. This unit did 1.7% average in the hot box, which is good for a half point deduction. It got close to the excellent bracket, but not close enough. Finally, ripple control was excellent on all three main rails, so no deduction there. That adds up to a solid 9.5.

Functionality (20% of the final score) - again, we'll deduct from a perfect score again. If we can find something to nitpick, that is. Fully modular - no deduction. Decent amount of cables - no deduction. Thorough documentation, albeit scattered - no deduction. Lots of goodies - no deduction. Semi-fanless operation - no deduction. The heck with this, I'll just give it a 10.

Value (20% of the final score) - $159.99 is the going rate for these at Newegg right now. Competing with it is the Silverstone ST85F-P, which is much cheaper, but also Silver certified. But the real threat though is from the ST85F-GS, which is still ten bucks cheaper and in a much shallower housing. While this one outperforms that unit, the Silverstone simply gets into spaces this one cannot due to the much longer housing. There's also strong competition from XFX at the same price and same power level. So, I'll do an 8.5 here, I think.

Build Quality (20% of the final score) - right out of the gate, I'm taking away the full point for capacitors. Ltec, schmelltec. I'm also taking half a point for the burns on the Nichicon on the VRM board. But there I stop, because the rest is absolutely flawless. 8.5.

Performance

9.5

Functionality

10

Value

8.5

Build Quality

8.5

Total Score

9.2

Summary

Corsair's fully modular RM850 just so happens to be a better product than its little brother, the RM650. Iffy capacitor selection notwithstanding, what we have here is a very solid and very well built unit from an OEM known for building solid and well built units. I had no issues with this unit shutting down when it wasn't supposed to, and it performed wonderfully. I'd like to see the price come down just a touch, but that's just me being a cheapskate.

The Good:

  • excellent ripple suppression
  • very good voltage regulation
  • fully modular
  • semi-fanless

The Bad:

  • Ltec capacitors used throughout

The Mediocre:

  • quiet swishy noises made by the fan in test four, hot box


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