HP Z400 H2D81US, VA799UT 799UT#ABA manual Main power cable, P1

Display port

4	ML_Lane 1(p)		14	GND
5	GND		15	AUX CH(p)
6	ML_Lane 1(n)		16	GND
7	ML_Lane 2(p)		17	AUX CH(n)
8	GND		18	Hot Plug Detect
9	ML_Lane 2(n)		19	DP_PWR Return
10	ML_Lane 3(p)		20	DP_PWR
Main power cable, P1
13				24
1				12
Pin	Signal	Pin	Signal	Pin	Signal
1	+3.3V	9	+5 Vaux	17	GND
2	+3.3V	10	+12 V-B	18	GND
3	GND	11	+12 V-B	19	GND
4	+5V	12	12 V-D	20	GND
5	GND	13	+3.3V	21	+5V
6	+5V	14	–12V	22	+5V
7	GND	15	GND	23	12 V-D
8	POK	16	PS_ON_L	24	GND

164 Appendix A Connector pins ENWW