ATA/ATAPI (IDE) standard drive cable connector
Pin Signal Pin Signal Pin Signal
1 2 3
4 5
Reset Ground
DD7 DD8 DD6
15 16
17 18
19
DD1 DD14 DD0
DD15 Ground
29 30
31 32
33
DMAK Ground INTRQ
IOCS16 DA1
6 7 8
9 10
DD9 DD5 DD10
DD4 DD11
20 21
22 23
24
(Key) DMARQ
Ground DIOW
Ground
34 35
36 37
38
PDIAG (cable detect) DA0
DA2 CS1FX CS3FX
11 12
13 14
DD3 DD12 DD2
DD13
25 26
27 28
DIOR Ground
IORDY CSEL
39 40 DASP Ground
24-Pin Main power connector P1
112
13 24
1 +3.3 V 8 POK 14 -12 VL 21 +5 V GND
2 +3.3 V 9 +5 Vaux 15 GND 22 +5 V and
3 GND 10 +12 V-B 16 PS_O
N_l
+5 V-Rsense
4 +5 V 11 +12 V-A 17 GND 23 +5 V
5 GND 12 +3.3 V 18 GND 24 GND
6 +5 V 13 +3.3 V 19 GND
7 GND +3.3V-Rsense 20 GND
CAUTION Be sure you can differentiate between which power cable connects to the PCI
Express x16 graphics card and which power cable connects to the system board. These two
cables have different pin counts and different colors. The PCI Express power cable has a 6-pin
black connector, and the system board power cable has an 8-pin white connector. When power
is present, you must never connect the PCI Express power cable to the system board. If you do
so, the system board may be damaged and your warranty voided.
164 Appendix C Appendix C — Connector pins ENWW
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