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Thread: Can a Underrated Power Supply Kill a Motherboard?

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    Quote Originally Posted by Stefan Payne View Post
    Old = Bad

    You wouldn't call a 150MHz Pentium good today either.
    Why would you call a PSU that came with such systems "not bad" today??
    Probably because, and I may be wrong about this, but PSU development in the computer industry seems to advance but look at laundry machines, televisions, appliances, etc. all from the 1980s that were much more reliable than the crap coming out these days that breaks in a few years.

    The age-old saying everybody has heard from their uncles or whomever, "this stuff don't last like it used to".

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    Quote Originally Posted by Stefan Payne View Post
    Old = Bad

    You wouldn't call a 150MHz Pentium good today either.
    Why would you call a PSU that came with such systems "not bad" today??
    True, in that sense and that old it's bad and not really for modern hardware.
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    Let us not forget cars. It was once common to see cars on the side of the road, usually having problems with their ignition systems. Now it is rare to see disabled cars. Oh, you see them, but not like we used to.

    And then there are airliners. Do you really think that jets from the 1980's hold up better than today's jets?
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    Quote Originally Posted by ehume View Post
    Let us not forget cars. It was once common to see cars on the side of the road, usually having problems with their ignition systems. Now it is rare to see disabled cars. Oh, you see them, but not like we used to.

    And then there are airliners. Do you really think that jets from the 1980's hold up better than today's jets?
    Yeah it's called Improvements and innovation, and you have to alter and redesign things.
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    Magic Smoke is offline If you see me than you did something wrong
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    Quote Originally Posted by Magic Smoke View Post
    It was a 20 pin but they used an adaptor to make it 24 pin (the adaptor came with the PSU).
    I feel like i caused a bit of confusion with this comment so here is what i was trying to say...

    The connector on the motherboard is 24 pin while the connector on the PSU was a 20 pin, so to get around that, the "replacement" PSU (the one that was the relabeled FSP unit) came with a 20 pin to 24 pin adaptor.

    Of course, what i'm saying now may not matter anymore but i thought i should clarify what i was saying.
    Last edited by Magic Smoke; 07-28-2018 at 10:06 AM.

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    The purchase was not wasted as it is always good to have a spare power supply around for testing or backup.
    Last edited by ashiekh; 07-28-2018 at 04:33 PM.

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    Now it makes sense, the move from 20 to 24 was to add an extra line for the 3.3, 5 and 12V so using a 20 pin power supply on a 24 pin computer was probably not a great idea.
    Last edited by ashiekh; 07-28-2018 at 07:58 PM.

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    Quote Originally Posted by turkey3_scratch View Post
    The age-old saying everybody has heard from their uncles or whomever, "this stuff don't last like it used to".

    Active PFC might be reducing modern power supply life; I'm not saying it is a bad thing, just that there might be an associated penalty.


    Somehow I managed to make 3 separate posts; apologies.
    Last edited by ashiekh; 07-28-2018 at 08:13 PM.

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    Quote Originally Posted by ashiekh View Post
    Now it makes sense, the move from 20 to 24 was to add an extra line for the 3.3, 5 and 12V so using a 20 pin power supply on a 24 pin computer was probably not a great idea.
    At the time when this was actual and for quite some time after, unless you had a very high spec pc and/or overclocked you were mostly fine with 20 pin PSU. IIRC it was recommended not to use the 20 to 24 pin adapter because it could introduce problems.
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    Quote Originally Posted by ashiekh View Post
    Now it makes sense, the move from 20 to 24 was to add an extra line for the 3.3, 5 and 12V so using a 20 pin power supply on a 24 pin computer was probably not a great idea.
    That wasn't the real problem at all.

    The Real Problem is the switch from +5V heavy load to +12V with increased amperage on +12V...
    The 20pin ATX THings had sometimes up to 40 or 50A on +5V at best...
    And still like 20, maybe 28A on +12V or so.

    20pin = ATX 1.x
    24pin = ATX 2.x

    With all that comes with it.

    An example of such an old thing:
    https://www.amazon.de/ATX-Netzteil-q.../dp/B00GXO77F8

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