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The nForce3 250 Gb has sixteen power planes...
Functional blocks of the nForce3 250 Gb use separate power planes.
nForce3 250 Gb Power Planes
Signal
Voltage
Definition
+1.6V
1.6 V
1.6 V Core Power.
This voltage powers the nForce3 250 Gb core.
+1.6V_DUAL
1.6 V
Auxiliary 1.6 V Core Power. This voltage powers the nForce3 250 Gb core power management circuitry.
+1.2V_HT
1.2 V
1.2 V HyperTransport Power. This voltage powers the HyperTransport Interface.
+1.5V
1.5 V
1.5 V AGP Power.
This voltage powers the AGP interface. The nForce3 250 Gb only supports AGP3.0/2.0 signaling levels and therefore this voltage
must be 1.5 V.
+3.3V
3.3 V
3.3 V Power. This voltage powers the I/O interfaces to 3.3 V peripherals.
+3.3V_DUAL
3.3 V
Auxiliary 3.3 V. This voltage powers the power management circuitry interfacing to 3.3 V peripherals.
+3.3V_PLL
3.3 V
3.3 V PLL Power.
This voltage powers the internal PLL.
+3.3V_PLL_DUAL
3.3 V
3.3 V PLL Standby Power. This voltage powers the internal PLL in power management
states.
+3.3V_USB_DUAL
3.3 V
3.3 V USB Power.
This voltage powers the two integrated USB controllers.
+3.3V_VBAT
3.3 V
3.3 V RTC Battery Back-Up Power. This voltage powers the battery backed-up real-time clock.
+5V
5 V
5 V Power. This voltage powers the nForce3 250 Gb I/O pads from 5 V peripherals.
+5V_DUAL
5 V
Auxiliary 5 V. This voltage powers the power management circuitry interfacing to 5 V peripherals.
SP_VDD
1.6 V
1.6 V Integrated SATA Power. This voltage powers the integrated SATA core.
SP_VDD_3P3
3.3 V
3.3 V Integrated SATA Power. This voltage powers the integrated SATA logic.
VDD_SATAD
1.8 V
1.8 V External SATA PHY Interface Power. This voltage powers the external SATA PHY interface.
V3P3_DEEP
3.3 V
3.3 V Deep Sleep Power. This voltage powers the power button, deep sleep, and wake logic. This signal is only used for mobile pplications. This signal MUST always be connected to +3.3V_DUAL.
Чтобы хоть немного разобраться в питании nForce3, приведу кое-какую полезную информацию.
Voltage characteristics
DC Current Characteristics