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32 RDRAM devices, no matter how many
R
I
M
M
R
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M
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184-pin memory module that supports
contain up to maximum of 16 RDRAM devices.
S
D
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M
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y
n
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(
S
y
n
SDRAM is one of the DRAM technologies that allows DRAM to use the same clock as the CPU
host bus
(EDO
and FPM are asynchronous and do not have clock signal). It is similar as
to use burst mode transfer. SDRAM comes in 64-bit 168-pin
the first company to support dual-SDRAM DIMMs onboard (AP5V), from Q1 1996
S
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M
(
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g
l
e
S
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(
S
i
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g
l
e
SIMM socket is only 72-pin, and is only single side. The golden finger signals on each side of PCB
are identical. That is why it was called Single In Line. SIMM is made by FPM or
supports 32-bit data. SIMM had been phased out on current motherboard design.
S
M
B
u
s
(
S
y
s
t
S
M
B
u
s
(
S
y
s
t
SMBus is also called I2C bus. It is a two-wire bus developed for component communication
(especially for semiconductor IC). For example, set clock of clock generator for jumper-less
motherboard. The data transfer rate of SMBus is only 100Kbit/s, it allows one host to communicate
RIMM
RDRAM
c
h
r
o
n
o
u
s
D
R
A
c
h
r
o
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o
u
s
D
R
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I
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i
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M
e
m
o
I
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L
i
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e
M
e
m
o
e
m
M
a
n
a
g
e
m
e
e
m
M
a
n
a
g
e
m
e
sockets.
memory technology. A RIMM memory module may
M
)
M
)
DIMM
r
y
M
o
d
u
l
e
)
r
y
M
o
d
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e
)
n
t
B
u
s
)
n
t
B
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s
)
147
O
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l
i
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M
a
O
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l
i
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M
a
PBSRAM
and operates at 3.3V. AOpen is
EDO
DRAM and
n
u
a
l
n
u
a
l
A
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