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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
26
27
28
29
30
51
52
53
54
55
PRSNT1
+12V
+12V
GND
JTAG2
PERn(2)
GND
GND
PERp3
PERn3
GND
PERp8
PERN8
GND
GND
6
7
8
9
10
31
32
33
34
35
56
57
58
59
60
JTAG3
JTAG4
JTAG5
+3.3V
+3.3V
GND
RSVD
RSVD
GND
PERp4
PERp9
PERn9
GND
GND
PERp10
11
12
13
14
15
36
37
38
39
40
61
62
63
64
65
PERST#
GND
REFCLK+
REFCLKGND
PERn4
GND
GND
PERp5
PERn5
PERn10
GND
GND
PERp11
PERn11
16
17
18
19
20
41
42
43
44
45
66
67
68
69
70
PERp0
PERn0
GND
RSVD
GND
GND
GND
PERp6
PERn6
GND
GND
GND
PERp12
PERn12
GND
16
17
18
19
20
41
42
43
44
45
66
67
68
69
70
PERp0
PERn0
GND
RSVD
GND
GND
GND
PERp6
PERn6
GND
GND
GND
PERp12
PERn12
GND
76
77
78
79
80
PERp14
PERn14
GND
GND
PERp15
81
82
PERn15
GND
Pin
B
information
is
on
the
next
page
NOTE:
x1
PCI
Express
uses
pins
1-18.
x4
PCI
Express
uses
pins
1-32.
x8
PCI
Express
uses
pins
1-49.
x16
PCI
Express
uses
pins
1-8.
91