Power Supply PINOUT legend with description

[The-Ponch]

Hello everyone, I'm re purposing a PC power supply for my 3D printer and apart from the set of 4 cables the printers uses, the rest of the plug is really just in the way. What I'm in the middle of doing now it to remove all the unneeded wires to clean up clutter and am thinking it would be nice to re-purpose some of the connections to power other things like a USB port for example. I have a wireing diagram and of course I'll use the correct +5V and ground for the USB port, but there are other poin outs that I don't understand what they can do. For example, here is the legend for the PS I'm working with:
GND (Obviously Ground)
+3.3V (Possitive 3.3 volts)
+3.3 V SnS (What's SnS?)
+5V (Possitive 5 volts)
+5 SBY (What's SBY?)
-12V (What's the difference between the + and -?)
+12VA (Not sure why these are labled A through E?)
+12VB
+12VC
+12VD
+12VE
PWR On (I used this and jumped to GND to allow for the Power Supply to work sans Motherboard)
PWR Good (Would this power a sensor or can it be used for anything outside of a PC case?)


Sorry, I know there's lots here ... any help would be great. Basically I'm going to print (3d printer) a case for this PS and have the face fitted with what ever I can reuse.

Thank you in advance

Ponch

 

[CountMike]

Try here: https://allpinouts.org/pinouts/
If it's a single rail PSU all the wires of same Voltage come from same place on the PSU board. Same goes for all the ground wires. Any negative Voltage wires could be ignored. Power Good is only for MBs to confirm that all Voltages are at right level and BIOS ca proceed with BOOT sequence.
+5 SBY (What's SBY?) = StandBy Voltage needed to power up MB for remote startup over network or KB or mouse, also has a role in waking from sleep modes. Usually required to provide 0.5 - 2A of current at 5vdc.

 

[Poncherelly]

Here is the PinOut map https://goo.gl/diAD7Q. With this and the details from CountMike, I think everything is answered.

Thank you.