[??] ???????(PSU)???????

?????????(POWER SUPPLY)?,
???????????,????????(??)!

?????,??????????????????,
??????????????????,
??????,???????,????????????!

???????????????????????,
?????[????](??)!

???????,???????????,??100%??????,
??????????????,?????????,
????(??)????????,????????,
?????????????.

????(??)???:
?????????????110V????,?????????????,
??????,??????????????????????????,
??????????or??(Efficiency).

??(??) = ??????? / ???????

???????,
???????????100%???????????????,
????50%~85%??????????,
??50%~15%,???????????,???????????...

?????????????250W???,

(i)
????????????????,?????80%,
?????????:313W
(313W * 80% = 250W)

(ii)
????????????????,?????65%,
?????????:385W
(385W * 65% = 250W)

??,
???????????,????24??????3?(???26280??).
?????250W???:

80%???????????:
250/80%*26280 = 8212500 w hr = 8212.5 kw hr = 8212.5 ?

65%???????????:
250/65%*26280 = 10107692 w hr = 10107.7 kw hr = 10107.7 ?

??65%????80%????????,
?????250W????3?????,??????:
10107.7 - 8212.5 = 1895.2 ??

?? 1?? 2.5??????,?????????4738???.

(?????????????????1579?,
????????????????.)

????????????300?W??????,
??????????1600??,???????????500?,
???????????500?,???????????4738????...

??,
??????????????????,???????1500?,
??????50%??,??????;
?????250W????,????????80%??????,
???4914.36??,??????12286????...
?????,????!

??,?????,
?????????????(??)?????????...
???????????????,????????????!

????,
????????????(??)??,
?????????????????????Efficiency???.

???????????Efficiency????????,
?????Active PFC (??? ??????)?POWER.

????????(PFC)??,??? ??Efficiency??,
??,????? ??????(A-PFC)???,?????????.

???? [???PFC],????[???PFC]??[?PFC]?,
???PFC?????????,
?????power????,?????110V-220V?????.

??,
????????????,??????????????????,
??????????????,??????~~~
??????????????,
????????????????POWER,????????...

PS.
???????????????????,
?????????SeaSonic?80plus?S12II????...
(???????S12II?330W?????.)

PS.
????????????????????????,
?????????,???????????,
??????????...
http://www.jscustompcs.com/power_supply/

PS.
?????????????????????,??????????.
?????????????????????????,
??,??????????????????????,
??????????????!
(??????,???????????...)
http://mypaper.pchome.com.tw/news/liousuh/3/1280091286/20070223000817/