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Thread: Corsair CS850M 850W review @ TomsHardware

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    Default Corsair CS850M 850W review @ TomsHardware

    Many enthusiasts don't have the budget for a flagship power supply, but still crave high efficiency to save money on electricity. They want enough capacity for a couple of powerful graphics cards, plus modular cables for trouble-free installation. Corsair's CS850M seems to fit this description. On top of that, it offers decent performance.
    http://www.tomshardware.com/reviews/...pply,4104.html

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    Originally Posted by Aris Mpitziopoulos
    1.All of the protections we look for are enabled except for over-current protection (which simply isn't needed in a high-capacity single-rail power supply).

    2.Sitronix's ST9S429-PQ14, a protections IC, is installed on the main PCB. It's a rebadged Unisonic Technologies S3515 without OTP (over-temperature protection) support, so OTP must, if it's present at all, be implemented another way. We only found one thermistor attached to the secondary heat sink, so we suspect that OTP isn't provided at all, even though it's mentioned in this unit’s specs.
    According to Thermaltake's support, when i asked them in the past, If there isn't OCP there should be OPP , but according to the tech specs OPP isn't present as well ( http://www.tomshardware.com/reviews/...pply,4104.html )
    Originally Posted by Thermaltake Service Center
    Hi sir,
    Single set of 12V design will result OCP protection will be very close to the OPP (Over power protection)
    So the design is using the OPP protection
    So, to conclude, the CS850 doesn't have OCP & OPP & OTP (*perhaps??) ??
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    OPP (Over-Power Protection) is realized in the primary controller, and the CM6901X used in this PSU most certainly has that feature.

    In single-rail DC-DC PSU's such as this one, OCP and OPP tend to be all but equal in practice, with OCP being slightly faster.
    Careful what you wish for... You just might get it.

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    What about OCPs for minor rails?

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    Quote Originally Posted by McSteel View Post
    OPP (Over-Power Protection) is realized in the primary controller, and the CM6901X used in this PSU most certainly has that feature.
    ?? If it has that feature, then why is it not mentioned at the specs?
    http://www.tomshardware.com/reviews/...pply,4104.html
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    Quote Originally Posted by McSteel View Post
    OPP (Over-Power Protection) is realized in the primary controller, and the CM6901X used in this PSU most certainly has that feature.

    In single-rail DC-DC PSU's such as this one, OCP and OPP tend to be all but equal in practice, with OCP being slightly faster.
    Correct. The CS850 does have OCP using OPP since it's a single +12V rail with DC to DC. And there is OTP. I wish Aris would have reached out to ask. I'll get with the engineers on exactly how it is implemented, but it's there.

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    the specifications table that I provided had OPP listed but they messed it some how with the phrase short/over circuit protection. Will tell them to fix it. Another editor inputs table data there so some errors like this might occur in the future. Sorry about this

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    IIRC, OTP is implemented via the fan controller. If the temps get too high, it shorts out one of the other (since the S3515 has no OTP) protections of the IC, thus shutting the PSU down. We've had this discussion on this forum before, along with the OTP one, but I can understand why someone would forget or not be able to find it using the search function.

    ....we suspect that OTP isn't provided at all, even though it's mentioned in this unit’s specs.
    I know you've had a hard time consistently getting reviewers' guides from your contact at Corsair, but that certainly doesn't mean you should "assume" things.

    Congrats on getting the gig at Tom's Hardware. But please don't get sucked into their dreck of shoddy reviews, poor editing and all around shitty writing. You're better than that, Aris.

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    Quote Originally Posted by jonnyGURU View Post
    Congrats on getting the gig at Tom's Hardware. But please don't get sucked into their dreck of shoddy reviews, poor editing and all around shitty writing. You're better than that, Aris.
    Have you seen the fanboys they write for? Most of the helpful forum members left several years back with the influx of 14 year old kids spewing out the brands they happened to choose for their PC build as "the only option".

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    I'm probably one of the strictest when it comes to protections. Still, if I don't find one I always ask for the company rep first. Sometimes you just miss something.

    Great review, anyway!
    Last edited by Philipus II; 04-27-2015 at 06:47 PM. Reason: spelling needed some work

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