Hey all I am using an old Dell Precision R5400 which has the 750w hot swap-able power supply. Problem being, since its a dell, the ATX pin layout is different than that of a normal, standard ATX 2.0 power supply pin out.
What I found to be the Standard ATX 2.0 pinout: 
I have taken a volt meter to the R5400's ATX pinout and this is what I come up with:
[1] Ground [13] Ground
[2] +5v [14] +5v
[3] +5v [15] +5v
[4] +12v [16] +3.3vsb
[5] -12v [17] Ground
[ 6] Ground [18] Ground
[7] +3.3vsb [19] +12v
[ 8] +3.3v [20] +3.3vsb
[9] Ground [21] +12v
[10] +3.3v [22] +3.3v
[11] +3.3v [23] +3.3v
[12] +3.3v [24] +3.3vsb
Thankfully my motherboard's manual shows the pinout of it's ATX power supply connector: 
So some questions are still wondering inside my head:
1) What voltage should the PSON# be?
2) What voltage should the Power OK be?
3) As you see, I do not have access to a +5Vsb from the R5400 PSU. Can I just use a normal 5vdc for that (or somehow get 3.3vsb that I do have to work with it)?
Currently this is my pin-out for my new connector from the R5400 connector to the motherboard: 
So do you see anything wrong with the above? Just making sure as I do not want to fry a $500+ server motherboard over one wrong pin.