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What mistake did I make here :S

Discussion in 'Power Supplies' started by ubersonic, Sep 13, 2017.

  1. ubersonic

    Capodecina

    Joined: May 26, 2009

    Posts: 17,759

    I recently RMA'd a PSU which I believed was faulty, after it had been installed and the system powered on it immediately blew up two hard drives. Hooking up a PSU tester to the cable the SATA plugs were on revealed no PG reading and the 12v light failed to illuminate (worked fine with the cable the Molex plugs were on). So I figured that was the issue, it simply had never been tested when it came off the assembly line and the 12v overvolted and blew the drives (at least one of the SATA plugs was burnt too).

    Got an email today stating the following:

    So now I'm super confused, how can it blow up £100+ of HDDs at my end and show PSU errors when tested but pass the RMA tests fine :S

    Any idea as I'm a bit confused as to how I messed this up, I thought for sure I was right.
     
  2. Sasahara

    Mobster

    Joined: Feb 12, 2009

    Posts: 2,620

    I assume that kind of vague text means they are sending back the original PSU and not replacing it.

    It may have been a dodgy plugs rather than the actual PSU, as they got burned I would guess they didn't test them.

    The PG reading is just the signal the PSU send down one of the 24 pin mobo cables. It's a very basic safety feature for starting up a PSU. Just because it passes this doesn't mean the PSU is working correctly.
    You effectively asking as the PSU to test itself with that reading.

    The other readings on the Dr power would be more interesting, but if the PSU isn't under load when testing it's not going to be a 100% accurate test. I'm guessing a basic device like the Dr power won't put any real load on the PSU.

    So in short(excuse the pun :< ) a cheap PSU tester isn't an infallible test. I guess OCUK did they test rather than sending it off to the manufacture who would expect have more professional testing equipment.

    Though £50 for a 850 W PSU, just says it all imo, I don't need to open it up. :)
     
  3. pastymuncher

    Man of Honour

    Joined: Jul 12, 2005

    Posts: 15,636

    Location: Aberlour, NE Scotland

    The mistake you made was buying a crap psu. Seriously, it's rubbish. Look at the label when you get it back (or enlarge the picture on the store page) and you will see that the so called Kolink Core series 850w only has 672w on the 12v rail and I doubt if it would even manage that. In addition Kolink states on the label that maximum continous usage is not to exceed 700w!! That says everything you need to know about the components inside it. It's probably only a small step up from a generic psu.
     
  4. EsaT

    Mobster

    Joined: Jun 6, 2008

    Posts: 2,765

    Location: Finland

    I'm sure they did test that it doesn't explode instantly when connected to power.


    BTW, There was recently EU wide safety testing of mostly Chinese etc. cheap LED light equipment. (85 different models)
    54% failing EMC requirements is small concern when 60% got straight sales ban from clear safety deficiencies.
    And another 10% needed deficiencies fixed.

    Buy cheap China production...
    It's like said in Dirty Harry: Do you feel lucky?
     
  5. ubersonic

    Capodecina

    Joined: May 26, 2009

    Posts: 17,759

    Obviously I wasn't expecting a Superflower, but for a product built in the EU by a sister company of OCUK I kinda figured it wouldn't blow up components like some cheap Chinese junk lol, being told they can't find anything wrong with it (after being sent pictures of the drives it destroyed, the damage to itself, and it failing a PSU test) is just insult to injury.
     
  6. EsaT

    Mobster

    Joined: Jun 6, 2008

    Posts: 2,765

    Location: Finland

    When lot more higher priced PSUs (Seasonics etc) are produced still in China it's guaranteed genuine China Export garbage from start to finish.
    I doubt there's even single component (say FETs from Infineon) in it made by European company.

    Maybe if it had one zero less in power sticker then it could be made in EU.
     
  7. ubersonic

    Capodecina

    Joined: May 26, 2009

    Posts: 17,759

    Well, returned PSU arrived back today, surprise surprise it's still broken (as to be expected as they couldn't find the problem), PSU tester still showing errors, still visible damage to the SATA port one of the HDDs it killed was connected to. Obviously the guy testing it either couldn't be bothered to test all of the cables or just didn't test it at all.

    What exactly should I do from here? Videotape it blowing up drives and post it on their Facebook page? :S

    Obviously I'm quite unhappy about this, I'm down the price of the PSU, the value of the HDDs and the price of the return postage. In retrospect I should have gone for the 600w EVGA one that was the same price but I figured a PSU made by an EU company tied to OCUK with a good rep would be better than this >.>
     
    Last edited: Sep 14, 2017
  8. skyripper

    Wise Guy

    Joined: Jul 19, 2011

    Posts: 1,200

    Contact Bailey using the customer service forum?
     
  9. ubersonic

    Capodecina

    Joined: May 26, 2009

    Posts: 17,759

    I did, he was the one who arranged for the RMA :(
     
  10. JasonM

    Wise Guy

    Joined: Jun 19, 2009

    Posts: 1,806

    The 2 most important things in a computer are PSU and environment (case, cooling and dust filtering) as the stability and reliability are dependent on these two things. Any good computer starts with a good PSU and case/cooling.
     
  11. amigafan2003

    Capodecina

    Joined: Jan 18, 2008

    Posts: 12,687

    Location: Fylde Coast, Lancashire

    Credit card charge back time
     


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