Power Rails (S/E): Difference between revisions

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The [[Xbox 360 S]] and [[Xbox 360 E]] [[motherboard]]s have various rails which power components of the system.
The [[Xbox 360 S]] and [[Xbox 360 E]] [[motherboard]]s have various rails which power components of the system.
This page applies to the [[Trinity]], [[Corona]], [[Waitsburg]], [[Stingray]], and [[Winchester]] motherboards.
== Standby Power ==
==== V_1P2STBY ====
* Voltage: 1.2V
* Source: [[#V_5P0STBY|V_5P0STBY]]
* Not present on [[Trinity]]
==== V_1P8STBY ====
* Voltage: 1.8V
* Source: [[#V_5P0STBY|V_5P0STBY]]
* Only present on [[Trinity]]
==== V_3P3STBY ====
* Voltage: 3.3V
* Source: [[#V_5P0STBY|V_5P0STBY]]
==== V_5P0STBY ====
* Voltage: 5V
* Source: [[Power Supply]]


== Main Power ==
== Main Power ==
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* Voltage: 12V
* Voltage: 12V
* Source: [[Power Supply]]
* Source: [[Power Supply]]
* Purpose: Full-On System Power, Sub-Rail Power
* Multipurpose System Power


==== V_1P2 ====
==== V_1P2 ====
* Voltage: 1.2V
* Voltage: 1.2V
* Source: [[#V_3P3|V_3P3]]
* Source: [[#V_3P3|V_3P3]]
* Purpose: [[KSB]] Power
* Multipurpose System Power
* Not present on [[Trinity]]
* Not present on [[Trinity]]


==== V_1P8 ====
==== V_1P8 ====
* Voltage: 1.8V
* Voltage: 1.8V
* Source: [[#V_5P0|V_5P0]] ([[Trinity]]), [[#V_3P3|V_3P3]] ([[Corona]] and newer)
* Source: [[#V_5P0|V_5P0]] ([[Trinity]]), Tied to [[#V_CPUPLL|V_CPUPLL]] ([[Corona]], [[Waitsburg]], [[Stingray]], and [[Winchester]])
* Purpose: [[Southbridge]] and [[HANA]] Power
* Multipurpose System Power


==== V_3P3 ====
==== V_3P3 ====
* Voltage: 3.3V
* Voltage: 3.3V
* Source: [[#V_12P0|V_12P0]]
* Source: [[#V_12P0|V_12P0]]
* Purpose: [[Southbridge]] and [[HANA]] Power, Sub-Rail Power
* Multipurpose System Power


==== V_5P0 ====
==== V_5P0 ====
* Voltage: 5V
* Voltage: 5V
* Source: [[#V_12P0|V_12P0]]
* Source: [[#V_12P0|V_12P0]]
* Purpose: USB and Sub-Rail Power
* Multipurpose System Power
 
==== V_5P0DUAL ====
* Voltage: 5V
* Source: [[#V_5P0|V_5P0]] or [[#V_5P0STBY|V_5P0STBY]], controlled by [[SMC]]
* Purpose: USB Port Power


==== V_CPUCORE ====
==== V_CPUCORE ====
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* Voltage: 1.83V
* Voltage: 1.83V
* Source: [[#V_3P3|V_3P3]]
* Source: [[#V_3P3|V_3P3]]
* Purpose: [[CPU]] PLL Power
* Purpose: [[CGPU]] PLL Power


==== V_CPUVCS ====
==== V_CPUVCS ====
* Voltage: 1.25-1.3V, controlled by [[CPU]] via APS (CPU VID * 1.4)
* Voltage: 1.25-1.3V, controlled by [[CPU]] via APS (CPU VID * 1.4)
* Source: [[#V_5P0|V_5P0]]
* Source: [[#V_5P0|V_5P0]]
* Purpose: [[CPU]] VCS Power
* Purpose: [[CGPU]] VCS Power
 
==== V_EFUSE ====
* Voltage: 1.5V
* Source: [[#V_5P0|V_5P0]]
* Purpose: [[CGPU]] [[eFUSE]] Power
 
==== V_GPUPCIE ====
* Voltage: 1.5V
* Source: [[#V_3P3|V_3P3]]
* Purpose: [[CGPU]] [[PCIe]] Power


==== V_MEM ====
==== V_MEM ====
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* Source: [[#V_12P0|V_12P0]]
* Source: [[#V_12P0|V_12P0]]
* Purpose: [[RAM]] Power
* Purpose: [[RAM]] Power
==== V_SBPCIE ====
* Voltage: 1.83V
* Source: Tied to [[#V_CPUPLL|V_CPUPLL]]
* Purpose: [[Southbridge]] [[PCIe]] Power
* Only present on [[Trinity]]


{{Motherboard Components}}
{{Motherboard Components}}

Latest revision as of 21:59, 5 June 2023

For Original Xbox 360, see Power Rails (Original).

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

This page applies to the Trinity, Corona, Waitsburg, Stingray, and Winchester motherboards.

Standby Power

V_1P2STBY

V_1P8STBY

V_3P3STBY

V_5P0STBY

Main Power

V_12P0

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_5P0DUAL

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: CGPU PLL Power

V_CPUVCS

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

V_EFUSE

V_GPUPCIE

V_MEM

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

V_SBPCIE


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