Power Rails (S/E)

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The Xbox 360 S and Xbox 360 E motherboards have various rails which power components of the system.

Main Power

V_12P0

  • Voltage: 12V
  • Source: Power Supply
  • Purpose: Main Power Supply

V_1P2

  • Voltage: 1.2V
  • Source: V_3P3
  • Multipurpose System Power
  • Not present on Trinity

V_1P8

V_3P3

  • Voltage: 3.3V
  • Source: V_12P0
  • Multipurpose System Power

V_5P0

  • Voltage: 5V
  • Source: V_12P0
  • Multipurpose System Power

V_CPUCORE

  • Voltage: 0.9-1.2V, controlled by CPU via APS
  • Source: V_12P0
  • Purpose: CGPU Power

V_CPUEDRAM

V_CPUPLL

  • Voltage: 1.83V
  • Source: V_3P3
  • Purpose: CPU PLL Power

V_CPUVCS

  • Voltage: 1.25-1.3V, controlled by CPU via APS (CPU VID * 1.4)
  • Source: V_5P0
  • Purpose: CPU VCS Power

V_MEM

  • Voltage: 1.8V
  • Source: V_12P0
  • Purpose: RAM Power