So what do the negative voltage lines do, anyway?

[Crazy Jayhawk]

Maybe this is the wrong forum for this. If it is, I apologize. Feel free to move it if necessary.

I've looked at the labels on PSU's and they list -5V and -12V. Both are listed as putting out very small maximum currents. What are these wires there for? :confused:

[_Will_]

well u can use the -5 combined with +12 to get a 7 volt mod....

but im not really sure what you could use the -12 for...unless you tore apart the mobo connector or the inside of your cpu ....

i imagine theres probably a common use for it unknown to me tho....maybe from the past and discontinued? i have no idea, really...maybe someone more knowledgeable can help ya out

[!-=sky=-!]

well a note to the above post

it's the +12v and +5v that makes 7v

[Crazy Jayhawk]

I mean, the -5 and -12 lines plug directly into the motherboard. They don't have a very high current rating. However, I'm still puzzled as to what their purpose is.

[Veland]

I don't know much electronics, but some components require negative voltages. But with very low amps, not many components require this. The only circuit I'VE seen that required negative voltages, was a driver circuit for a an LCD display. Anyone know excatly what MB components require this?