Specifications

1
Introduction
1.1 Overview
This document describes the system behavior of Muxless Switchable Graphics
technology PX5.0 along with general platform hardware and system BIOS
requirements.
1.2 Scope
Switchable Graphics technology is a platform feature that applies to systems
equipped with a discrete graphics processor unit (dGPU) and an integrated graphics
processor unit (fGPU/iGPU), which is designed to allow the system to switch between
GPUs (graphics processor units) in order to help achieve designed performance or
power savings.
AMD now introduces Muxless Switchable Graphics technology PX5.0, which
enhances the dynamic scheme of PX4.0 with a number of new features.
Please refer to the Muxless ATI
TM
Switchable Graphics Technology PX4.0 Functional
Specification for a detail description of PX4.0.
This document provides the functional description of Muxless Switchable Graphics
technology PX5.0, interfaces, and requirements.
1.3 Acronyms/Abbreviations
Acronym or Abbreviation Definition
A + A
Platforms with AMD Fusion graphics and AMD discrete graphics.
A + I
Platforms with AMD discrete graphics and Intel integrated graphics.
ACPI
Acronym for “Advanced Configuration and Power Interface.”
ADL
Acronym for “AMD Driver Library.”
ATPX
AMD proprietary ACPI method for switchable graphics platforms.
BACO
Acronym for “Bus Alive Chip Off.” A low-power inactive graphics-device
state where the bus interface is powered on, and the PCI configuration
space is exposed to the operating system.
CCC
Acronym for “Catalyst™ Control Center.”
dGPU
Acronym for “Discrete Graphics Processor Unit.”
Dynamic-zero
Internal codename for the technology to turn off the dGPU when the dGPU
is idle.
fGPU
Acronym for “AMD Fusion Graphics Processor Unit.”
© 2011 Advanced Micro Devices, Inc.
Proprietary and Confidential - Do not duplicate.
Muxless Switchable Graphics Technology PX5.0 Functional Specification
137-41940-10