Power Rails (Original): Difference between revisions

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* Source: [[#V_5P0|V_5P0]]
* Source: [[#V_5P0|V_5P0]]
* Purpose: [[CPU]] VCS Power
* Purpose: [[CPU]] VCS Power
* Not present on [[Xenon (Motherboard)|Xenon]], [[Elpis (Motherboard)|Elpis]], and [[Zephyr]]
* Not present on [[Xenon (Motherboard)|Xenon]], [[Zephyr]], and [[Elpis (Motherboard)|Elpis]]
 
==== V_EFUSE ====
* Voltage: 3.5V
* Source: [[#V_5P0|V_5P0]]
* Purpose: [[CPU]] [[eFUSE]] Power


==== V_GPUCORE ====
==== V_GPUCORE ====
Line 45: Line 50:
* Source: [[#V_12P0|V_12P0]]
* Source: [[#V_12P0|V_12P0]]
* Purpose: [[GPU]] and [[eDRAM]] Power
* Purpose: [[GPU]] and [[eDRAM]] Power
==== V_GPUPCIE ====
* [[Xenon (Motherboard)|Xenon]] [[Zephyr]], [[Falcon]], and [[Elpis (Motherboard)|Elpis]]
** Voltage: 1.25V
** Source: [[#V_3P3|V_3P3]]
* [[Jasper]] and [[Tonasket]]
** Voltage: 1.075
** Source: Tied to [[#V_GPUCORE|V_GPUCORE]] ([[Jasper]] and [[Tonasket]])
* Purpose: [[GPU]] [[PCIe]] Power


==== V_MEM ====
==== V_MEM ====
Line 50: Line 64:
* Source: [[#V_12P0|V_12P0]]
* Source: [[#V_12P0|V_12P0]]
* Purpose: [[RAM]] Power
* Purpose: [[RAM]] Power
==== V_SBPCIE ====
* Voltage: 1.87V
* Source: [[#V_3P3|V_3P3]]
* Purpose: [[Southbridge]] [[PCIe]] Power


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

Revision as of 22:49, 5 June 2023

For Xbox 360 S and Xbox 360 E, see Power Rails (S/E).

The Original Xbox 360's motherboard has various rails which power components of the system.

Main Power

V_12P0

V_1P8

  • Voltage: 1.8V
  • Source: V_5P0 or tied to V_MEM
  • Multipurpose System Power

V_3P3

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

V_5P0

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

V_CPUCORE

  • Voltage: 1.1-1.4V, controlled by CPU via APS
  • Source: V_12P0
  • Purpose: CPU Power

V_CPUPLL

  • Voltage: 1.8V
  • Source: V_3P3 or tied to V_1P8
  • Purpose: CPU PLL Power

V_CPUVCS

  • Voltage: 1.32-1.68V, controlled by CPU via APS (CPU VID * 1.2)
  • Source: V_5P0
  • Purpose: CPU VCS Power
  • Not present on Xenon, Zephyr, and Elpis

V_EFUSE

V_GPUCORE

  • Voltage: 1.075-1.150V, controlled by VID strapping
  • Source: V_12P0
  • Purpose: GPU and eDRAM Power

V_GPUPCIE

V_MEM

  • Voltage: 1.72V-2.1V, controlled by strapping
  • Source: V_12P0
  • Purpose: RAM Power

V_SBPCIE


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