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2-44 Chapter 2: Hardware information
12. Power supply SMBus connector (5-pin PSUSMB1)
This connector is for the power supply SMB cable, if your power supply
supports the SMBus function.
®
DSEB-D16 Series Power supply SMBus connector
PSUSMB1
+3.3V Remote Sense
GND
NC
I2C_7_DATA#
I2C_7_CLK#
13. SSI power connectors (24-pin ATXPWR1, 8-pin ATX12V1, 4-pin ATX12V2)
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.
• For a fully congured system, we recommend that you use an SSI
12 V-compliant power supply unit (PSU) for LGA771-socket Intel
®
Xeon
Dual Core processors (Bensley platform).
• DO NOT forget to connect the 24+8+4-pin power plugs; otherwise, the
system will not boot up.
• Use of a PSU with a higher power output is recommended when conguring
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.
®
DSEB-D16 Series ATX power connectors
8-pin
GND12V2
GND12V2
GND12V1
GND12V1
24-pin Power Connector
ATXPWR1
ATX12V1
4-pin
ATX12V2
+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
+12V DC GND
+12V DC GND