Why they keep using superfasts for +12 V?

[Behemot]

It is something I do not understand. Even if there is decent-rated rectifier, it is still superfast in most of the crappier PSU's. Note that by using shottky you can save very high ammounts of power and raise the efficiency pretty much.

Are superfasts so much cheaper over shottkies?

[rogfanther]

Re: Why they keep using superfasts for +12 V?

Simply put, yes. Some 2 cents cheaper, but in the big volumes, that add up.

[Pentium4]

Re: Why they keep using superfasts for +12 V?

annoying, right? the POS i was analyzing the other day had schottky's for the 5V and 3.3V but an ultra fast recovery diode on the 12V....why not the other way around?!

[Behemot]

Re: Why they keep using superfasts for +12 V?

Most likely cause it's meant for older systems draining power from +5 V/+3,3 V. Low voltage = high current = higher loss. Well on 12 V you have lower current drain so there is not so high loss, right?

[Pentium4]

Re: Why they keep using superfasts for +12 V?

True. But it's been a while since Pentium 3's and Athlon XP's ruled the land

[Behemot]

Re: Why they keep using superfasts for +12 V?

Yep. Well it's been a while since they made good PSU