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- Power Supply Oddity
- Jack Gillis
October 29, 2006, 10:18 pm
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my Biostar M7VIG motherboard reports 0v for the -5v rail. The system works
just fine so I decided to look into it a little bit. I discovered the power
connector on supply does not have a wire on pin 18 ( that is where the MB
manual says it expects -5v) so of course the BIOS was reporting 0v.
No one around here knows what the -5v might have been used for nor why the
manual calls for it on pin 18 when the it apparently lives happily without
it. I remember that back in TTL days, -5v was commonly used.
Can someone clue me in here?