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Thread: Facing a strange issue with Corsair CX550

  1. #101
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    Quote Originally Posted by whitestar_999 View Post
    @Per Hansson My UPS batteries are still providing backup with 400W FSP psu so either the "APFC circuit has damaged the bulk filtering cap a bit when running from a modified square wave" or "Probably the relays in the UPS are a bit worn now causing longer switch over time" might be the reason. I will update it here whenever I find new info or if I buy new UPS.

    Just for the record, I don't think the following are responsible for what you see

    * damaged bulk capacitor
    * relays slowing with time

    I don't see how a damaged bulk capacitor would increase the load on the UPS, and I don't see why relays would slow with age.

    For now I still think the problem lies with an aging battery, and is why I suggested the car battery test.
    Last edited by ashiekh; 05-23-2018 at 01:06 PM.

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    Unfortunately I can't do the car battery test(getting a new UPS is the next best option for me).I also found out about this:
    https://www.cybenetics.com/code/pdf.php?id=CUj
    Holdup time is 11.93ms!
    Attached Images Attached Images

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    Quote Originally Posted by whitestar_999 View Post
    Unfortunately I can't do the car battery test(getting a new UPS is the next best option for me).I also found out about this:
    https://www.cybenetics.com/code/pdf.php?id=CUj
    Holdup time is 11.93ms!
    I don't see the relevance here of hold-up time, since the problem was with UPS over-load. Even so 12ms is less than the 16ms Per Hansson says is called for by the ATX specs, and your electricity runs at 50Hz (the ATX time is based on 60Hz)

    I suggested the car battery test as it is the most economical (borrow a car battery), while purchasing and trying different parts can be expensive.

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    In my country car batteries are not that common(outside of auto repair shops) & if one ask for a car battery to test something with a PC,best you will get is strange looks & worst you will be given some lecture or be quoted some ridiculous price.

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    What I meant is that a friend allows you to borrow theirs for an evening; I'm just trying to locate zero cost solutions to testing. One could even do the whole thing with jumper leads without even removing the battery.

    https://en.wikipedia.org/wiki/List_o...les_per_capita
    India has 50 cars per 1000 people, so it might be challenging.
    Last edited by ashiekh; 05-24-2018 at 10:37 AM.

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    Quote Originally Posted by Per Hansson View Post
    The Corsair CX600M for example scored 6.8ms
    The Engineers cut it very close; the peak to peak time is 8ms for 60Hz, 10ms for 50Hz
    Last edited by ashiekh; 05-23-2018 at 04:01 PM.

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    Cars are considered "special family asset" in India & thus it is easier to ask a friend to loan money instead of asking to loan his car battery because for loaning money he need not ask anybody but loaning a car battery will require asking his other family members for permission.

  8. #108
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    Thank you for the explanation; out here I am the one who fixes the car, so I forget that not everyone can do as they please with the car.

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    UPDATE: I don't know what happened but everything is working fine now. I thought of doing some more tests with CX550 to see if I would need a higher VA UPS but this time everything worked. I am now using CX550 with same system & same UPS & there is no sudden shutdown/overload of UPS following a power cut no matter the load on system(aka while playing videos using madvr that uses ~70-90% of 1050Ti).The only difference I can think of from before is that AC mains power supply coming to pure sine wave inverter(which then feeds power to UPS) is steady with no voltage fluctuations.

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    Were all tests done on a fully charged battery?

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