Tinker

From what I can see alot of the older PSU's used brown for the 3.3v the newer ones will be orange on a standard 24 pin connector.

Extra info I took a look at the backplane On the left (From left to right) x1 Purple - 5vaux x2 White - 3.3vaux X1 Slim yellow - N12v X2 yellow /Black stripe - SB_return X3 yellow /Blue stripe - +12V1 X7 Black - Gnd X6 Light brown - 3.3v On centre X1 Light brown - 3.3v X3 Orange - +12v3 X3 Red /White stripe X2 Light brown /White stripe +12v2 X2 Slim Dark brown /White stripe +12v2 X2 Dark pink - +5V X6 Slim red +5v X17 Black - Gnd thanks in advance for any help

I am interested in converting an old server case to accept an atx motherboard The case is hstns-2116 with 2 850W psu’s with psu backplane. The psu’s themselves don’t have any wires coming off them but the backplane does there is 3 bunches of cables coming off them. 1 at 18 pins (P1) 1 at 22 pins (P2) 1 at 10 pins (P3) The main objective is to use an atx mainboard in it and be able to keep the redundancy of 2 psu’s. for the main reason I have it so why not make use of it.