81
A
A
X
X
4
4
T
T
I
I
I
I
-
-
5
5
3
3
3
3
/
/
A
A
X
X
4
4
T
T
I
I
I
I
-
-
5
5
3
3
3
3
N
N
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
C
C
O
O
D
D
E
E
C
C
(
(
C
C
o
o
d
d
i
i
n
n
g
g
a
a
n
n
d
d
D
D
e
e
c
c
o
o
d
d
i
i
n
n
g
g
)
)
Normally, CODEC means a circuit that can do digital to analog conversion and also the analog to digital conversion. It is part of
AC97
sound/modem solution.
D
D
D
D
R
R
(
(
D
D
o
o
u
u
b
b
l
l
e
e
D
D
a
a
t
t
a
a
R
R
a
a
t
t
e
e
d
d
)
)
S
S
D
D
R
R
A
A
M
M
DDR SDRAM utilizes the existing DRAM infrastructure and technology while doubling the nominal bandwidth available to
systems in an easy to design and simple to adopt way. Initially a perfect solution for memory intensive server and workstation
applications, DDR low cost and low voltage will ultimately make it an ideal solution for all segments of the PC market, high
performance desktop and mobile PCs, Value PCs and even Internet Appliances and mobile devices.
D
D
I
I
M
M
M
M
(
(
D
D
u
u
a
a
l
l
I
I
n
n
L
L
i
i
n
n
e
e
M
M
e
e
m
m
o
o
r
r
y
y
M
M
o
o
d
d
u
u
l
l
e
e
)
)
DIMM socket has total 168-pin and supports 64-bit data. It can be single or double side, the golden finger signals on each side
of PCB are different, and that is why it was called Dual In Line. Almost all DIMMs are made by
SDRAM
, which operate at 3.3V.
Note that some old DIMMs are made by FPM/
EDO
and only operate at 5V. Do not confuse them with SDRAM DIMM.
D
D
M
M
A
A
(
(
D
D
i
i
r
r
e
e
c
c
t
t
M
M
e
e
m
m
o
o
r
r
y
y
A
A
c
c
c
c
e
e
s
s
s
s
)
)
Channel for communications between the memory and surrounding devices.
