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Why are used PSUs worth so little?

post #1 of 46
Thread Starter 
I'm having no luck selling mine for $100 less than I paid for it, but I check on eBay and I see similar models being sold for ~35% of their new value. Why is that?
post #2 of 46
they are worth so little, because over time they lose their power (usually 20% every year if its running 24/7). its just the way it works

a 1000w psu after 1 year will be an 800w psu, then a 640w psu, then a 520w psu and so on...

you have to account for it being a used item, and it not being capable of upholding its origional specifications
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post #3 of 46
Quote:
Originally Posted by maxhudson View Post
they are worth so little, because over time they lose their power (usually 20% every year if its running 24/7). its just the way it works

a 1000w psu after 1 year will be an 800w psu, then a 640w psu, then a 520w psu and so on...

you have to account for it being a used item, and it not being capable of upholding its origional specifications
That can't possibly be true...I've never heard this before. Can someone either confirm or deny this please.
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post #4 of 46
Thread Starter 
Quote:
Originally Posted by flamingoyster View Post
That can't possibly be true...I've never heard this before. Can someone either confirm or deny this please.
Same. Doesn't make sense to me.

Also, my old computer, the one with my 1,100 Tagan, never ran for more than 8 hours non-stop.
post #5 of 46
maybe its closer to 15%, but im sure thats right
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post #6 of 46
They degrade after time I suppose (slowly) and they're something that people like to buy new for whatever reason.

Quote:
Originally Posted by maxhudson View Post
they are worth so little, because over time they lose their power (usually 20% every year if its running 24/7). its just the way it works

a 1000w psu after 1 year will be an 800w psu, then a 640w psu, then a 520w psu and so on...

you have to account for it being a used item, and it not being capable of upholding its origional specifications
GTHO with that trash.

Guys, don't worry.

Don't listen to this guy at all costs.
    
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post #7 of 46
Quote:
Originally Posted by AdmiralThrawn View Post
I'm having no luck selling mine for $100 less than I paid for it, but I check on eBay and I see similar models being sold for ~35% of their new value. Why is that?
We're cheap?
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post #8 of 46
20%/year? No. Maybe with low-end trash. With good power supplies it's more like 2-5%/year if it uses decent Chinese/Taiwanese caps (OST quality or similar or better), and <1%/year for Japanese caps, at least for the first few years.


They're worth so little because... Because. Everyone wants to buy new, since unlike graphics cards there's no way to test to ensure full functionality without an ATE and oscilloscope.
post #9 of 46
They do degrade. Capacitors, fets, and other components wear out.

I doubt you can accurate guess how much wear one will take without knowing what kind of load and temperatures its used under.

Used PSUs are risky, as you have no idea of knowing how much usable life it's got.
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post #10 of 46
Oh..

Sorry...

I was just trying to help. Why was everyone being so mean about it just because i was wrong? Its not like i made it up... thats what i heard from someone when i was buying my 1000hx...
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