Which line is 12v and which is 5v ?

[StrangeRanger]

on the power leads from an atx power supply. isn't the yellow the 5v? i'm having a total brain fart.
j

 

[neuralfx]

switch it, yellow is 12+..
-neural

 

[RossGr]

Actually

red -> +5V
orange -> 3.3V
yellow -> +12V
Purple -> +5VStandby (always on!)
whithe -> -5V
blue -> -12V
black -> Com