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PCI Express
x1, x4, x8, and x16 PCI Express Connector
Pin A
Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal
1
2
3
4
5
PRSNT1
+12V
+12V
GND
JTAG2
6
7
8
9
10
JTAG3
JTAG4
JTAG5
+3.3V
+3.3V
11
12
13
14
15
PERST#
GND
REFCLK+
REFCLK-
GND
16
17
18
19
20
PERp0
PERn0
GND
RSVD
GND
21
22
23
24
25
PERp1
PERn1
GND
GND
PERp2
26
27
28
29
30
PERn(2)
GND
GND
PERp3
PERn3
31
32
33
34
35
GND
RSVD
RSVD
GND
PERp4
36
37
38
39
40
PERn4
GND
GND
PERp5
PERn5
41
42
43
44
45
GND
GND
PERp6
PERn6
GND
46
47
48
49
50
GND
PERp7
PERn7
GND
RSVD
51
52
53
54
55
GND
PERp8
PERN8
GND
GND
56
57
58
59
60
PERp9
PERn9
GND
GND
PERp10
61
62
63
64
65
PERn10
GND
GND
PERp11
PERn11
66
67
68
69
70
GND
GND
PERp12
PERn12
GND
71
72
73
74
75
GND
PERp13
PERn13
GND
GND
PCI Express
87