Corsair RM850x V2 PSU Review: Smaller And Quieter!

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Protection Features

Check out our PSUs 101 article to learn more about PSU protection features. Our protection features evaluation methodology is described in detail here.

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Protection Features
OCP12V: 89A (125.71%), 12.095V 5V: 32.91A(131.64%), 4.97V 3.3V: 33.58A (134.32%), 3.27V 5VSB: 5.6A (186.7%), 85.56mV ripple
OPP1083.385W (124.2%)
OTP✓ (195°C @ main transformer)
SCP12V: ✓ 5V: ✓ 3.3V: ✓ 5VSB: ✓ -12V: ✓
PWR_OKOperates properly
SIPSurge: MOV Inrush: NTC thermistor & bypass relay

Over-current protection on the minor rails lands where we'd expect. However, the 5VSB rail should have a lower OCP threshold in order to avoid exceeding 50mV of ripple. The over-temperature protection limit is set quite high, which is often the case in CWT designs. Meanwhile, short circuit protection is accounted for on every rail. There is a MOV for surge protection, and the NTC thermistor (responsible for inrush current protection) is supported by a bypass relay now. That was missing from the previous-gen RMx PSUs.

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Aris Mpitziopoulos
Contributing Editor

Aris Mpitziopoulos is a contributing editor at Tom's Hardware, covering PSUs.

  • parkerygc8
    Sweet, first review of this I've seen. Thanks.
  • leclod
    I didn't go into detail, but I wonder what's the use of that Gold PSU when there's a Seasonic Focus Plus Platinum 750 for a similar price ?
  • Aris_Mp
    Gold, Platinum, it doesn't really matter at this efficiency point. What matters the most, in my opinion at least, is noise output now besides the basic (reliability and overall performance).
  • powernod
    At last some scoring at the review conclusion!! I always considered the lack of score as Tom's greater weakness about their reviews !!