VIA Technologies P4M266A User Manual page 25

Mainboard for intel socket 478 processor
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34
33
40
39
1
2
FDD
1
2
IDE1/IDE2
29
29

+12V
5VSB
PW-OK
"
!
Ground
+12V
+12V
+5V
Ground
Ground
Ground

+5V
PW12
Ground
3.3V
3.3V

PW1
:
.,,
1,-
IDE1/IDE2:
.,,
1,-
When use two IDE drives, one must be set to Master
mode and the other one to Slave mode. Refer to your
disk drive user’s manual for information about select-
ing the proper drive switch settings.
PW1:
PW12:
Caution:
The PW1 and PW12 Power Connector must be used simultaneously

or else this system will not boot-up.
+5V
+5V
-5V
The board requires a minimum of 250 Watt power
Ground
Ground
supply to operate. Your system configuration (amount
Ground
of memory, add-in cards, peripherals, etc.) may
PS-ON
Ground
exceed this minimum power requirement. To ensure
-12V
that adequate power is provided, use a 300 Watt or
3.3V

greater power supply.
Installation
Page 3-11

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