
Environmental Specifications
Intel® Server Board SE7520BD2 Technical Product Specification
148
Intel Confidential
Revision 1.3
7.2.2 Voltages
Supported
The EPS12V 550-W power supply generates the following voltages: +5v, +3.3v, +12v, -12v and
+5v Standby. High-frequency processor support will need a ~650W power supply, which is not
yet defined. Other voltages required by the design are derived from linear and switching
regulators. Refer to the modified power supply specification for additional information.
Table 96. Intel® Server Board SE7520BD2 Board Voltage Table
Voltage
Net Name
Source
Tolerance
+12V
P12V
Power Supply
+5% / -4%
+3.3V
P3V3
Power Supply
+5% / -3%
-12V
N12V
Power Supply
+9% / -5%
+5V
P5V
Power Supply
+5% / -4%
+5V Standby
P5V_STBY
Power Supply
+5% / -3%
+12V
P12V_CPU_0
Power Supply
+5% / -4%
+12V
P12V_CPU_1
Power Supply
+5% / -4%
+0V GND Power
Supply
N/A
+3.3V Standby
P3V3_STBY
Linear Regulator from +5V Standby
+/-2.5%
+3.3V Auxiliary
P3V3_AUX
Switches between 3.3V main and standby power rail
depending on normal operation and sleep states
respectively
+/-3%
+1.2V
P_VTT
Linear Regulator from +1.8V
+/-3%
+1.5V
P1V5
Switching Regulator from +5V
+/-3%
+1.8V
P1V8_SCSI
Linear Regulator from +3.3V
+/-3%
+2.5V
P2V5_VIDEO
Linear Regulator from +5V
+/-3%
+2.5V PV_SCSIA,
PV_SCSIB
Linear Regulator from +5V
+/-1%
+1.8V
P1V8
Switching Regulator from +12V
+/-3% (without
power switches)
+1.8V DDR
P1V8_CHA,
P1V8_CHB
MCH_VCCDDR
Switched rail from P1V8
+3/-3% (without
power switches)
+1.8V Auxiliary
P1V8_NIC
Linear Regulator from +3.3V or +3.3V standby
+/-3%
+1.0V Auxiliary
P1V0_NIC
Linear Regulator from +3.3V or +3.3V Standby
+/-3%
+1.2V Auxiliary
Lan_V_1P2
Linear Regulator from +3.3V Standby
+/-3%
+2.5V Auxiliary
Lan_V_2P5
Linear Regulator from +3.3V Standby
+/-3%
+1.5V
P1V5_PXH
Linear Regulator from +3.3V
+/-3%
+1.5V or +3.3V
PCI_VIO
Switched rail from either 1.5V linear or 3.3V rail
+/-3%
VID CPU0
P_VCCP0
Switching Regulator from +12V
N/A
VID CPU1
P_VCCP1
Switching Regulator from +12V
N/A