Hey guys.
I've read more than once before that a psu loses efficiency after a while. How long does it take for a psu to start getting 'old'? Pretty soon I'm gonna be in the market for a 800w psu, and since they can be quite pricey I might consider buying a used one.
Thanks!
electricity is heat ,power supply is rated at 80% for the following reason it will give at least 80% of the number standing on the box so if it was a 1000w it will atleast give 800w the other 20% is heat ,the nasty cheapie one fong tong only actually give 50% so a 400w will give only 200w power and make 50% heat .
Corsair on the other hand not talking about the cheap one that i have
,the more expensive ones you can actually draw more power from that is rated ,certain power supply can`t even give their labeled power ,and then the ambient temp comes into play.
800w is not 800w is only marketed by the test the company itself has done.
expensive ones can draw more power then rated and is tested at normal temps for example corsair tx 650 is tested at 50c and can run 100 000 hours ,a 800w huntkey is at 25c also for 100 000 hours ,if heat goes up the effiency goes down .
so huntkey drawing 800w will let it blow at 50c at full load ...........tx 650w will actually draw more power so will actually still work when drawing 800w for a short amount of time
mostly if you need 700w you get a 800 for headroom ,power supply works less ,meaning more effecient ,
With every year the effiency goes down yes but depends on the parts inside like the caps they use ,if its japanese and a certian cap used in specific psu it will lasts and age less then cheaper caps ,so its not the price of power supply but certain models in each name brand .
thermaltake never had problems ,corsair never had problems .......gigabyte huntkey fong tong never in my life again
driving a car that is rated for 240km/h and refs is 8000 ........will you drive 250km/h and at 9000 refs all day ?
