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Installation
Section 3-2
System Memory Configuration
Memory Layout
The EP-3VBA2/6VBA2 supports (3) PC133 168-pin DIMMs (Dual In-line
Memory Module). The DIMMs can be either EDO (Enhanced Data Out) or
SDRAM (Synchronized DRAM).
•
DIMM SDRAM may be 83MHz (12ns), 100MHz (10ns) or
125MHz (8ns) bus speed.
•
If you use both 50ns and 60ns memory you must configure
your BIOS to read 60ns.
•
When using Synchronous DRAM we recommend using the
4 clock variety over the 2 clock.
Figure 2 and Table 1 show several possible memory configurations using both
SIMM and DIMM.
T
t o
l a
M
e
m
o
y r
E
D
O
=
2
6 5
M
B
8
M
, B
M
a
i x
m
u
m
1
8 2
M
E
D
O
=
5
2 1
M
B
8
M
, B
M
a
i x
m
u
m
1
8 2
M
E
D
O
=
7
8 6
M
B
8
M
, B
M
a
i x
m
u
m
1
8 2
M
* SDRAM only supports 8, 16, 32, 64, 128, 256MB DIMM modules.
* We recommend to use PC100 Memory Module for bus speed between 66MHz
and 100MHz and PC133 Memory for bus speed over 100MHz.
* Using non-compliant memory with higher bus speed (over clocking) may
severely compromise the integrity of the system.
Page 3-6
DIMM 1
DIMM 2
DIMM 3
Figure 2
D
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M
M
1
B (
a
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k
/ 0
) 1
S /
D
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6 1
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2 3
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N
o
B
2 ,
6 5
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1
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4 6
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, B
2 3
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4 6
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8
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6 5
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X
1
1
8 2
Table 1
EP-3VBA2/6VBA2
B a n k 0 /1
B a n k 2 /3
B a n k 4 /5
D
I
M
M
2
B (
a
n
k
/ 2
) 3
e n
N
O
S /
D
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A
M
*
, B
6 1
M
, B
2 3
M
, B
4 6
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N
M
B
2 ,
6 5
M
B
X
1
O
S /
D
R
A
M
*
E
, B
6 1
M
, B
2 3
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, B
4 6
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8
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M
B
2 ,
6 5
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B
X
1
1
8 2
-Sy nch ro n o us
-E D O
D
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3
B (
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k
/ 4
) 5
o
e n
o
e n
D
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A
M
*
, B
6 1
M
, B
2 3
M
, B
4 6
M
, B
M
B
2 ,
6 5
M
B
X
1
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