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-5v Rail

post #1 of 5
Thread Starter 
I know that this specification is now deteremined obsolete and that the standard reference has removed it as necessary although some PSU's are still including it as backwards compatibility.

However, I wish to research this and can not seem to find any references. Can someone please link me to some reliable research?

thanks and a hat tip,

R
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post #2 of 5
You probably know that -5V was removed quite a while ago already:

Jan, 2002 - Remove –5V from all power distribution tables.
April, 2003 - Remove guidance for –5V rail
June, 2004 - Removed -5V reference

http://www.formfactors.org/developer...public_br2.pdf

This older spex (ATX12V 1.1) mentions -5V, but nothing about what it is for, just the current on it and such:
http://www.formfactors.org/developer...12V_PS_1_1.pdf
    
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post #3 of 5
Thread Starter 
Thanks Chozart. The -5V reference was removed and the activity was transferred to the 5VSB. So the standby, Restore from stanby on lan, etc is now being accessed on the 5VSB.
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post #4 of 5
I heard somewhere that it was used for ISA devices.
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post #5 of 5
Probably something like that, since it was part of the 20-pin power connector to the mobo. Thus, it was a mobo device. Since it's someting that's now gone, ISA would make sense
    
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