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Thread: Very quiet PSU around 400W for a workstation (70€)

  1. #31
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    No, those are the best choices.

    PS: the Links don't work.

  2. #32
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    [QUOTE=cifroes;152844]
    https://www.globaldata.pt/componente...0-silver-bn272
    https://www.globaldata.pt/componente...p-fm450ulag-9r

    Quote Originally Posted by Stefan Payne View Post
    PS: the Links don't work.
    You've got to be careful when copying and pasting forum posts with URLs in them. The URLs get truncated with "..."

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    Sorry about the links.

    Between the bitfenix and be quiet which one is gonna be quieter? Forget everything else, just about noise

  4. #34
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    Both should be inaudible.

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    Question here!
    Is the bulk cap(in APFC) one of the components that dies off first?
    I mean in high quality PSU ones which uses Japanese/105 Degrees/Over 2000h MTBF caps.

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    Quote Originally Posted by rgbodosk View Post
    Question here!
    Is the bulk cap(in APFC) one of the components that dies off first?
    I mean in high quality PSU ones which uses Japanese/105 Degrees/Over 2000h MTBF caps.
    I don't believe so, not for a long time i mean, since most electrolytic parts are rated 85 C to 105 C max, most people's PSU's won't exceed 50 C , For every 10 C lower temperature the lifetime of capacitors doubles.
    For example if a Cap is rated at 2000 hrs max lifetime @105 C, the capacitor's lifetime at 45 C as 120,000 hours about 14 years using the 10 C rule. Of course the electrolyte could dry up before that? But it depends.
    ....

  7. #37
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    Quote Originally Posted by rgbodosk View Post
    Question here!
    Is the bulk cap(in APFC) one of the components that dies off first?
    I mean in high quality PSU ones which uses Japanese/105 Degrees/Over 2000h MTBF caps.
    In 230VAC that rarely happens and isn't really important.
    In 115VAC it might be different, no idea, haven't seen much in Germany.
    Quote Originally Posted by Cyrix View Post
    I don't believe so, not for a long time i mean, since most electrolytic parts are rated 85 C to 105 C max, most people's PSU's won't exceed 50 C , For every 10 C lower temperature the lifetime of capacitors doubles.
    For example if a Cap is rated at 2000 hrs max lifetime @105 C, the capacitor's lifetime at 45 C as 120,000 hours about 14 years using the 10 C rule. Of course the electrolyte could dry up before that? But it depends.
    Well, keep in mind the higher ripple current capability of the 85°C Cap wich also has some relevance for the Lifetime Calculation.
    The 85°C usually have a bit higher Current Rating than the 105°C ones do.

    So in the end its more important, how good the AC Voltage coming in is and what voltage we are talking about...

    So that's more an issue for the 110VAC Areas than here in Europe...

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    rgbodosk (10-03-2018)

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