Corsair RM650x PSU Review

Evaluating Protection Features

You will learn more about PSU protections if you read the corresponding section of our PSUs 101 article.

Our protection features evaluation methodology is described in detail here.

Protection Features
OCP12V: -
5V: 31.2A (156%)
3.3V: 29.85A (144%)
5VSB: 6.2A (207%), 65.91mV Ripple
OPP807.55W (124.2%)
OTPYes (113 °C at +12V PCB)
SCP12V: Yes
5V: Yes
3.3V: Yes
5VSB: Yes
-12V: Yes
PWR_OKFunctions correctly
NLOYes
SIPSurge: MOV
Inrush: NTC

Since this PSU utilizes a single +12V rail, that part of the circuit doesn't use OCP. Meanwhile, the OCP triggering points on the minor rails are set quite high. The 5V and 3.3V rails do not drop their voltages too low, though. On the contrary, the 5VSB rail registers over 50mV ripple with loads close to the OCP's triggering point; Corsair should set its OCP much lower.

The OPP is at a normal level, while OTP's triggering point looks to be set quite high. We had to use a heat gun on the +12V board to figure out OTP's activation threshold.

As expected, SCP is present on all rails, including the -12V one, while the PWR_OK signal works properly (it drops before the rails go out of spec in case of power loss). Moreover, the PSU works properly when there is no load on its rails.

Unfortunately, the inrush current protection doesn't include a bypass relay. As we've mentioned, that's a shame. Hopefully Corsair adds one in a future revision. Finally, surge protection is provided through a MOV, which works well enough in desktop PSUs.

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  • maxwellmelon
    for all the good listed in this article, this series of psu just gets bashed in the fourms, just interesting.
  • basroil
    1432275 said:
    for all the good listed in this article, this series of psu just gets bashed in the fourms, just interesting.


    You're thinking of the older RM650, different design.

    The review here just made this unit be one of my recommended 650 models, tied with the EVGA G2/P2 and just below the Seasonic 660XP2!
  • pjc6281
    I have had this PSU for my new Skylake build for 2 months. Its GREAT, quiet and even have it pushing my old dinosaur Nvidia 590 with no problems. My old power supply was a Corsair AX1200 that was rock solid as well. Nothing but good experiences with them. I know others differ.
  • SR-71 Blackbird
    RMX doesn't get bashed , RMX and RMI are very very good. I own the RMX 850 , GREAT UNIT.
  • TechyInAZ
    I'm glad the new RM series is much higher quality. All I remember Corsair having is a bunch of bad PSUs with select few good PSU (like AX and HX).

    I hope this same kind of quality intros into other models like the newly refreshed CX PSUs.
  • anort3
    1432275 said:
    for all the good listed in this article, this series of psu just gets bashed in the fourms, just interesting.


    Yeah, I believe you are confusing the RMx and RMi with the older, mostly discontinued RM line. And of the old RM line only the 750w and 850w versions that were first made by Chicony Power Technology had the bad reputation. Anyone bashing the RMx and RMi doesn't know what they are talking about. Once misinformation gets out there it's hard to get it corrected though.

    Another great review Aris! :)
  • Nintendork
    Why buy Corsair or EVGA when you can get a Seasonic?
  • anort3
    205977 said:
    Why buy Corsair or EVGA when you can get a Seasonic?


    Seasonic doesn't have a lock on quality. They also don't offer a 10 year warranty which both Corsair and EVGA do on some models. Just off the top of my head Flextronics, CWT and SuperFlower are all capable of making units that are at least equal to high end Seasonic quality. There are others as well.
  • TechyInAZ
    218893 said:
    205977 said:
    Why buy Corsair or EVGA when you can get a Seasonic?
    Seasonic doesn't have a lock on quality. They also don't offer a 10 year warranty which both Corsair and EVGA do on some models. Just off the top of my head Flextronics, CWT and SuperFlower are all capable of making units that are at least equal to high end Seasonic quality. There are others as well.


    Plus, efficiency levels are typically better with EVGA than Seasonic.
  • anort3
    1695593 said:
    218893 said:
    205977 said:
    Why buy Corsair or EVGA when you can get a Seasonic?
    Seasonic doesn't have a lock on quality. They also don't offer a 10 year warranty which both Corsair and EVGA do on some models. Just off the top of my head Flextronics, CWT and SuperFlower are all capable of making units that are at least equal to high end Seasonic quality. There are others as well.
    Plus, efficiency levels are typically better with EVGA than Seasonic.


    :??: Not sure what you mean. EVGA has a couple of 80 Plus Titanium models but Seasonic has Titanium models in their new lineup. I'm not sure if those new Seasonic models are available yet though. Other than that I've had an 80 Plus Platinum Seasonic ( 660XP2 ) for a couple of years and their Platinum line has been out since at least 2011.
  • TechyInAZ
    Sorry I should of clarified. I mean the SuperNOVA G2 vs the gold 550W Seasonic PSUs.
  • SR-71 Blackbird
    The last few I have purchased are RMX , love them.
  • turkey3_scratch
    205977 said:
    Why buy Corsair or EVGA when you can get a Seasonic?


    Seasonic is not perfect. Many users are actually experiencing issues with Seasonic's Platinum lineup of units http://www.jonnyguru.com/forums/showthread.php?t=11038
  • SR-71 Blackbird
    All manufactures have issues two more PM's today , one about a DOA EVGA 600B and , 1 about a DOA Seasonic S12 , it happens , I told them , even the great ones have a few mixed in.
  • turkey3_scratch
    276663 said:
    All manufactures have issues two more PM's today , one about a DOA EVGA 600B and , 1 about a DOA Seasonic S12 , it happens , I told them , even the great ones have a few mixed in.


    But in this case there is a lot of people experiencing similar problems on Seasonic Platinum based units. Not that random DOA unit.
  • SR-71 Blackbird
    I was talking problems in General , all units have some any brand can have a few hiccups.


    That never brings a solid brand down.

  • turkey3_scratch
    That's what I love about these RMx units, it's near impossible to find a hiccup.
  • SR-71 Blackbird
    I love them , very impressed by the SF series too.
  • powernod
    Aris keeps making his reviews wider & even more detailed! His new addition , "evaluating protection features", is another crucial addition at the PSU Review field!! If he continoues this way, soon , every review of him, will be a standalone book!!:wahoo:
  • dark-ice
    I wanted to buy an EVGA P2 650W but amazon doesn't have stock, so I think I'm going to buy this one instead.