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SDRAM DIMM (168 pin, Unbuffered)

pinout

DIMM=Dual Inline Memory Module

168 pin DIMM
168 pin DIMM connector  at the motherboard
Front Side (left side 1-42, right side 43-84)
Back Side (left side 85-126, right side 127-168)

Front, Left

Pin Non-Parity 72 ECC? 80 ECC? Description
1VSSVSSVSSGround
2DQ0DQ0DQ0Data 0
3DQ1DQ1DQ1Data 1
4DQ2DQ2DQ2Data 2
5DQ3DQ3DQ3Data 3
6VDDVDDVDD+5 VDC or +3.3 VDC
7DQ4DQ4DQ4Data 4
8DQ5DQ5DQ5Data 5
9DQ6DQ6DQ6Data 6
10DQ7DQ7DQ7Data 7
11DQ8DQ8DQ8Data 8
12VSSVSSVSSGround
13DQ9DQ9DQ9Data 9
14DQ10DQ10DQ10Data 10
15DQ11DQ11DQ11Data 11
16DQ12DQ12DQ12Data 12
17DQ13DQ13DQ13Data 13
18VDDVDDVDD+5 VDC or +3.3 VDC
19DQ14DQ14DQ14Data 14
20DQ15DQ15DQ15Data 15
21n/cCB0CB0Parity/Check Bit Input/Output 0
22n/cCB1CB1Parity/Check Bit Input/Output 01
23VSSVSSVSSGround
24n/cn/cCB8Parity/Check Bit Input/Output 8
25n/cn/cCB9Parity/Check Bit Input/Output 9
26VDDVDDVDD+5 VDC or +3.3 VDC
27/WE/WE/WERead/Write
28DQMB0DQMB0DQMB0Byte Mask signal 0
29DQMB1DQMB1DQMB1Byte Mask signal 1
30/S0/S0/S0Chip Select 0
31DUDUDUDon't Use
32VSSVSSVSSGround
33A0A0A0Address 0
34A2A2A2Address 2
35A4A4A4Address 4
36A6A6A6Address 6
37A8A8A8Address 8
38A10/APA10/APA10/APAddress 10
39BA1BA1BA1Bank Address 1
40VDDVDDVDD+5 VDC or +3.3 VDC
41VDDVDDVDD+5 VDC or +3.3 VDC
42CK0CK0CK0Clock signal 0

Front, Right

Pin Non-Parity 72 ECC? 80 ECC? Description
43VSSVSSVSSGround
44DUDUDUDon't Use
45/S2/S2/S2Chip Select 2
46DQMB2DQMB2DQMB2Byte Mask signal 2
47DQMB3DQMB3DQMB3Byte Mask signal 3
48DUDUDUDon't Use
49VDDVDDVDD+5 VDC or +3.3 VDC
50n/cn/cCB10Parity/Check Bit Input/Output 10
51n/cn/cCB11Parity/Check Bit Input/Output 11
52n/cCB2CB2Parity/Check Bit Input/Output 2
53n/cCB3CB3Parity/Check Bit Input/Output 3
54VSSVSSVSSGround
55DQ16DQ16DQ16Data 16
56DQ17DQ17DQ17Data 17
57DQ18DQ18DQ18Data 18
58DQ19DQ19DQ19Data 19
59VDDVDDVDD+5 VDC or +3.3 VDC
60DQ20DQ20DQ20Data 20
61n/cn/cn/cNot connected
62Vref,NCVref,NCVref,NC 
63CKE1CKE1CKE1Clock Enable Signal 1
64VSSVSSVSSGround
65DQ21DQ21DQ21Data 21
66DQ22DQ22DQ22Data 22
67DQ23DQ23DQ23Data 23
68VSSVSSVSSGround
69DQ24DQ24DQ24Data 24
70DQ25DQ25DQ25Data 25
71DQ26DQ26DQ26Data 26
72DQ27DQ27DQ27Data 27
73VDDVDDVDD+5 VDC or +3.3 VDC
74DQ28DQ28DQ28Data 28
75DQ29DQ29DQ29Data 29
76DQ30DQ30DQ30Data 30
77DQ31DQ31DQ31Data 31
78VSSVSSVSSGround
79CK2CK2CK2Clock signal 2
80n/cn/cn/cNot connected
81n/cn/cn/cNot connected
82SDASDASDASerial Data
83SCLSCLSCLSerial Clock
84VDDVDDVDD+5 VDC or +3.3 VDC

Back, Left

Pin Non-Parity 72 ECC? 80 ECC? Description
85VSSVSSVSSGround
86DQ32DQ32DQ32Data 32
87DQ33DQ33DQ33Data 33
88DQ34DQ34DQ34Data 34
89DQ35DQ35DQ35Data 35
90VDDVDDVDD+5 VDC or +3.3 VDC
91DQ36DQ36DQ36Data 36
92DQ37DQ37DQ37Data 37
93DQ38DQ38DQ38Data 38
94DQ39DQ39DQ39Data 39
95DQ40DQ40DQ40Data 40
96VSSVSSVSSGround
97DQ41DQ41DQ41Data 41
98DQ42DQ42DQ42Data 42
99DQ43DQ43DQ43Data 43
100DQ44DQ44DQ44Data 44
101DQ45DQ45DQ45Data 45
102VDDVDDVDD+5 VDC or +3.3 VDC
103DQ46DQ46DQ46Data 46
104DQ47DQ47DQ47Data 47
105n/cCB4CB4Parity/Check Bit Input/Output 4
106n/cCB5CB5Parity/Check Bit Input/Output 5
107VSSVSSVSSGround
108n/cn/cCB12Parity/Check Bit Input/Output 12
109n/cn/cCB13Parity/Check Bit Input/Output 13
110VDDVDDVDD+5 VDC or +3.3 VDC
111/CAS/CAS/CASColumn Address Strobe
112DQMB4DQMB4DQMB4Byte Mask signal 4
113DQMB5DQMB5DQMB5 Byte Mask signal 5
114/S1/S1/S1Chip Select 1
115/RAS/RAS/RASRow Address Strobe
116VSSVSSVSSGround
117A1A1A1Address 1
118A3A3A3Address 3
119A5A5A5Address 5
120A7A7A7Address 7
121A9A9A9Address 9
122BA0BA0BA0Bank Address 0
123A11A11A11Address 11
124VDDVDDVDD+5 VDC or +3.3 VDC
125CK1CK1CK1Clock signal 1
126A12A12A12Address 12

Back, Right

Pin Non-Parity 72 ECC? 80 ECC? Description
127VSSVSSVSSGround
128CKE0CKE0CKE0Clock Enable Signal 0
129/S3/S3/S3Chip Select 3
130DQMB6DQMB6DQMB6Byte Mask signal 6
131DQMB7DQMB7DQMB7Byte Mask signal 7
132A13A13A13Address 13
133VDDVDDVDD+5 VDC or +3.3 VDC
134n/cn/cCB14Parity/Check Bit Input/Output 14
135n/cn/cCB15Parity/Check Bit Input/Output 15
136n/cCB6CB6Parity/Check Bit Input/Output 6
137n/cCB7CB7Parity/Check Bit Input/Output 7
138VSSVSSVSSGround
139DQ48DQ48DQ48Data 48
140DQ49DQ49DQ49Data 49
141DQ50DQ50DQ50Data 50
142DQ51DQ51DQ51Data 51
143VDDVDDVDD+5 VDC or +3.3 VDC
144DQ52DQ52DQ52Data 52
145n/cn/cn/cNot connected
146Vref,NCVref,NCVref,NC 
147n/cn/cn/cNot connected
148VSSVSSVSSGround
149DQ53DQ53DQ53Data 53
150DQ54DQ54DQ54Data 54
151DQ55DQ55DQ55Data 55
152VSSVSSVSSGround
153DQ56DQ56DQ56Data 56
154DQ57DQ57DQ57Data 57
155DQ58DQ58DQ58Data 58
156DQ59DQ59DQ59Data 59
157VDDVDDVDD+5 VDC or +3.3 VDC
158DQ60DQ60DQ60Data 60
159DQ61DQ61DQ61Data 61
160DQ62DQ62DQ62Data 62
161DQ63DQ63DQ63Data 63
162VSSVSSVSSGround
163CK3CK3CK3Clock signal 3
164n/cn/cn/cNot connected
165SA0SA0SA0Serial address 0
166SA1SA1SA1Serial address 1
167SA2SA2SA2Serial address 2
168VDDVDDVDD+5 VDC or +3.3 VDC

Source:www.pinouts.ru

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