User:Electron9/ATX2AT

Template:ATX power connector 24-pin ATX12V 2.x power supply connector (20-pin omits the last four: 11, 12, 23 and 24) Color Signal Pin Pin Signal Color Orange +3.3 V 1 13 +3.3 V Orange +3.3 V sense Brown Orange +3.3 V 2 14 −12 V Blue Black Ground 3 15 Ground Black Red +5 V 4 16 Power on Green Black Ground 5 17 Ground Black Red +5 V 6 18 Ground Black Black Ground 7 19 Ground Black Grey Power good 8 20 Reserved N/C Purple +5 V standby 9 21 +5 V Red Yellow +12 V 10 22 +5 V Red Yellow +12 V 11 23 +5 V Red Orange +3.3 V 12 24 Ground Black Pins 8, 13, and 16 (shaded) are control signals, not power: "Power On" is pulled up to +5V by the PSU, and must be driven low to turn on the PSU. "Power good" is low when other outputs have not yet reached, or are about to leave, correct voltages. The "+3.3 V sense" line is for remote sensing. Pin 20 (formerly −5V, white wire) is absent in current power supplies; it was optional in ATX and ATX12V ver. 1.2, and deleted as of ver. 1.3. The right-hand pins are numbered 11–20 in the 20-pin version.

Template:AT power connector AT power connector (Used on older AT style mainboards) Color Pin Signal P8.1 Power Good P8.2 +5 V P8.3 +12 V P8.4 −12 V P8.5 Ground P8.6 Ground P9.1 Ground P9.2 Ground P9.3 −5 V P9.4 +5 V P9.5 +5 V P9.6 +5 V

Color	Signal	Pin	Pin	Signal	Color
Orange	+3.3 V	1
Orange	+3.3 V	11
Orange	+3.3 V	2
Black	Ground	3	P8.5	Ground	Black
Black	Ground	13	P8.6	Ground	Black
Black	Ground	5	P9.1	Ground	Black
Black	Ground	15	P9.2	Ground	Black
Black	Ground	16
Black	Ground	7
Black	Ground	17
Red	+5 V	4	P8.2	+5 V	Red
Red	+5 V	6	P9.4	+5 V	Red
Red	+5 V	19	P9.5	+5 V	Red
Red	+5 V	20	P9.6	+5 V	Red
Yellow	+12 V	10	P8.3	+12 V	Yellow
Blue	−12 V	12	P8.4	−12 V	Blue
Green	Power on	14		Ground	Black
Grey	Power Good	8	P8.1	Power Good	Orange
N/C	Reserved	18	P9.3	-5 V	White
Purple	+5 V standby	9