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Thread: MTBF Difference for ax1200i and ax1600i

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    Default MTBF Difference for ax1200i and ax1600i

    ax1200i MTBF: 2,000,000 hours
    ax1600i MTBF: 100,000 hours

    Why the difference? Was a revised scale/methodology used for the estimation or are there actually component differences that do represent a substantially different estimated failure rate between the two PSUs?

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    Every Corsair PSU has a MTBF of 100.000 hour if I remember correctly. However it doesn't tell you anything at all.

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    I'm pretty sure the ax1200i is listed with 2,000,000 hours all over the net - reviews, vendor pages, etc.

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    Quote Originally Posted by 99wjtx View Post
    I'm pretty sure the ax1200i is listed with 2,000,000 hours all over the net - reviews, vendor pages, etc.
    https://www.corsair.com/us/en/Catego...tab-tech-specs 100.000 hours.

    Same goes for the cheapest Corsair: https://www.corsair.com/eu/en/Catego...tab-tech-specs

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    Quote Originally Posted by 99wjtx View Post
    ax1200i MTBF: 2,000,000 hours
    ax1600i MTBF: 100,000 hours

    Why the difference? Was a revised scale/methodology used for the estimation or are there actually component differences that do represent a substantially different estimated failure rate between the two PSUs?
    I'm not sure where you're getting the 2,000,000 hours MTBF from?

    100,000 hours is about 11.5 years, which is about right since Corsair warranties them for 10 years. 2,000,000 hours is over 228 years. That alone should tell you that the 2,000,000 hour rating is wrong.

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    OK, I'm not trying to troll here or be difficult but all you have to do is Google:

    ax1200i 2,000,000

    Just like that - to find out "where" I'm getting this from. As I mentioned, it's all over the place - reviews, vendor pages, etc.

    I get that "it doesn't matter" from the perspective of some and I'm familiar with arguments for and against consideration of MTBF as a indicator of reliability so there's no need to go into that here. At any rate, either 2,000,000 is and always was a mistake where mentioned in conjunction with the ax1200i or it really did appear on some document or package from Corsair at some point (and still could have been a mistake). *If* it wasn't a mistake, then why the difference. That was my question.

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    I see. It does appear that a lot of reviews and store listings list a 2,000,000 MTBF rating. My guess is this was a mistake on the Corsair website/technical specifications when the product was launched and they all just copied and pasted what the Corsair tech specs said, including all the mistakes.

    They're both 100,000.

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    Yes. Thanks. That's the only logical conclusion. I only thought it worth mentioning because it was so prolific and a few reviewers even commented on it! I also searched in vain for a discussion about it, thinking I'd find one somewhere but I couldn't.

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    Quote Originally Posted by Spotty View Post
    My guess is this was a mistake on the Corsair website/technical specifications when the product was launched
    Nope.

    I'm looking at the PRD right now from 8/31/2012:

    11.1 MTBF
    Calculated (25 degree Celsius, 80% load, 120Vac, 60Hz)
    >100,000 hours Mil-HDBK-217F
    >150,000 hours Telcordia

    Reviewer's guide (which I happened to write) does not mention MTBF at all.

    My guess they got the incorrect data from CNET and just regurgitated it. When they didn't see MTBF in the manual or reviewer's guide, they probably just Google "AX1200i MTBF" and copied whatever they found.

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    Larger (claimed) MTBF do actually exist


    Hard Drives

    https://www.seagate.com/files/www-co...10US-en_US.pdf
    MTBF 2,500,000hr

    https://www.cnet.com/products/fujits...ta-150-series/
    MTBF 3,000,000hr


    Are there any fans that use such bearings and so could also in principle reach such high MTBF
    Last edited by ashiekh; 3 Weeks Ago at 12:55 PM.

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