User's Manual

2-28 Chapter 2: Hardware information
8. ATX power connectors (24-pin ATXPWR1, 4-pin ATX12V1)
These connectors are for SSI power supply plugs. The power supply plugs are
designed to t these connectors in only one orientation. Find the proper orientation
and push down rmly until the connectors completely t.
• Use of an ATX 12 V Specication 2.0-compliant power supply unit (PSU)
that provides a minimum power of 450 W is recommended for a fully-
congured system.
• Do not forget to connect the 4-pin or 8-pin ATX +12 V power plug.
Otherwise, the system will not boot up.
• We recommend that you use a PSU with a higher power output when
conguring a system with more power consuming devices. The system may
become unstable or may not boot up if the power is inadequate.
• You must install a PSU with a higher power rating if you intend to install
additional devices.
®
P5BV-C/4L
P5BV-C/4L ATX Power Connector
+3 Volts +3 Volts Ground +5 Volts +5 Volts Ground Ground Power OK +5V Standby +12 Volts
-5 Volts
+5 Volts +3 Volts
-12 Volts
Ground Ground Ground
PSON#
Ground
+5 Volts
+12 Volts +3 Volts
+5 Volts
Ground
ATXPWR1 ATX12V1
+12V DC
GND
+12V DC
GND
9. Backplane SMBus connector (6-1 pin BPSMB1)
This connector allows you to connect System Management Bus devices
(SMBus). Devices communicate with an SMBus host or other SMBus devices
using the SMBus interface.
®
P5BV-C/4L
P5BV-C/4L SMBus Connector
BPSMB1
1
I2C_CLK#
GND
12CDAT P2
+5V
FAN_PWM
FAN_PWM