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Chapter 3
Onboard Resource Settings
D
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M
M
B
a
8
M
B
1 x
8
M
B
1 x
8
M
B
1 x
6 1
M
B
1 x
6 1
M
B
1 x
6 1
M
B
1 x
2 3
M
B
1 x
2 3
M
B
1 x
2 3
M
B
1 x
4 6
M
B
1 x
4 6
M
B
1 x
4 6
M
B
1 x
1
8 2
M
B
1 x
1
8 2
M
B
1 x
1
8 2
M
B
1 x
1
8 2
M
B
1 x
1
8 2
M
B
1 x
2
6 5
M
B
1 x
Frequently Asked Questions
Q: Why don't I get a display after I put in my old DIMM module?
A: The 440BX chipset requires the memory manufacturer to program an
EEPROM chip with SPD (Serial Presence Detection) on the module in order for
the BIOS to program the 440BX's timing registers properly. Your DIMM may
not have the EEPROM chip on the module, or the EEPROM may not contain
the correct program. Check with your memory vendor for details. The figure
below shows a DIMM module with an EEPROM chip.
k n
1
D
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M
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B
a
k n
2
0
8
M
B
1 x
8
M
B
1 x
8
M
B
1 x
6 1
M
B
1 x
6 1
M
B
1 x
6 1
M
B
1 x
2 3
M
B
1 x
2 3
M
B
1 x
2 3
M
B
1 x
4 6
M
B
1 x
4 6
M
B
1 x
4 6
M
B
1 x
1
8 2
M
B
1 x
1
8 2
M
B
1 x
1
8 2
M
B
1 x
2
6 5
M
B
1 x
2
6 5
M
B
1 x
32
D
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M
M
B
a
k n
3
0
0
8
M
B
1 x
8
M
B
1 x
8
M
B
1 x
6 1
M
B
1 x
6 1
M
B
1 x
6 1
M
B
1 x
2 3
M
B
1 x
2 3
M
B
1 x
2 3
M
B
1 x
4 6
M
B
1 x
4 6
M
B
1 x
4 6
M
B
1 x
1
8 2
M
B
1 x
2
6 5
M
B
1 x
2
6 5
M
B
1 x
2
6 5
M
B
1 x
T
t o
l a
8
M
B
6 1
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B
4 2
M
B
2 3
M
B
0 4
M
B
8 4
M
B
4 6
M
B
0 8
M
B
6 9
M
B
1
8 2
M
B
1
0 6
M
B
1
2 9
M
B
2
6 5
M
B
3
0 2
M
B
3
4 8
M
B
5
2 1
M
B
6
0 4
M
B
7
8 6
M
B
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