what does it mean , 2 or 3 or 4
12 volt rails on a computer power supply
and how do they look like
and whats thier use?
2007-09-08 18:30:12 · 2 answers · asked by rabea 2 in Computers & Internet ➔ Hardware ➔ Other - Hardware
by the way the new power supplies got 2,3 and 4 12volt rails
chick this site chick the diagram
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2974508&Sku=ULT31847%20K
2007-09-09 09:35:12 · update #1
Current graphics cards and processor support circuit draw mainly from the +12V rail. So there is now heavy use of the +12V rail.
For safety each rail is allowed to carry only about 220 watts max. So the +12V rail is limited to 18 amps. For delivery of more amps (direct current), additional rail or rails are provided. These rails supply the +12V needs through these connectors:
http://www.pcpower.com/products/assets/S61EPS/S61EPS2.jpg
2007-09-13 01:35:49 · answer #1 · answered by Karz 7 · 0⤊ 0⤋
I am not sure of the right answer here. A 12 volt rail could mean the bus rail for the 12 volt side of the power supply. There is one for 12 volt and one for 5 volt, the primary and secondary sides of the transformer. Each bus rail then has many connectors to power the motherboard, CD/DVD, Floppy, Hard Drive, etc.
My site below under Computer Talk, Identifying the parts, has a lot of detail regarding other ways to identify or quantitate a power supply.
Hope this helps
2007-09-09 06:03:34 · answer #2 · answered by Anonymous · 0⤊ 0⤋