Companies that make PC Power Supply Units (PSUs) find it difficult to make their products stand out from the crowd. On top of the increasingly outrageous wattage ratings (a quality 300 watt PSU is enough to run practically every PC out there, but lots of people buy something with a much higher rating just for the heck of it), there are multiple fans, funky cables, gold-plated connectors, little lights...
...and Power Factor Correction (PFC).
A PC PSU doesn't have to have PFC, but practically all of them do these days, because many countries have regulations that require some kind of PFC. Most PSUs have passive PFC; fancier models have active PFC.
Active PFC, your friendly shiny-suited PC salesman will explain, is more efficient. He may or may not also say that it'll save you money on your electricity bill.
Either way, he's full of crap...
Linkek:
http://www.dansdata.com/gz028.htm
http://www.silentpcreview.com/article28-page5.html
http://www.endpcnoise.com/cgi-bin/e/faqpfc.html
http://www.vicr.com/documents/application_notes/an1_active-pfc.pdf
Az altalam vett tapnal ugyan nincs kiirva, hogy PFC-vel ellatva, de ott van hogy:
-I/O Short Circuit & Overload Protection
-EMI Shielded VGA/HDD Power Connector (az egyik cikkben az EMI filtert emlitik az active PFC kor reszekent)
Ezert is gondoltam, hogy ennyi elegnek kell hogy legyen. Amugy ha tul nagy hulyesegeket irtam csak batran javitsatok ki. Remelem nem hangzik ugy, mintha en lennek a tapok szakertoje. Megegyszer a cikkek alapjan en ezekre a konkluziokra jutottam.
May the Force be with you!
