Nvidia Optimus: Difference between revisions
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Revision as of 08:44, 5 May 2011
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Nvidia Optimus is an optimization technology created by Nvidia to save battery life by automatically switching the power of the graphics processing unit (GPU) off when it is not needed and switching it on when needed again. The technology mainly targets mobile PCs such as notebooks.[1] When the GPU power is off the driver redirects graphics commands to the integrated graphics chip (e.g. Intel GMA). Currently only Windows 7 supports Optimus. In addition to lack of support for switching between GPU chipsets, the presence of Optimus can actually prevent the use of Nvidia chipset, even if installed GPU drivers support it.[2] Some older systems contain a hardware switch (mux) to switch the output between the two video devices, which could be set in the BIOS. With Optimus, this is not required, and the output frames from the Nvidia card are transferred over the PCIe bus to the integrated chipset, which then displays them. In systems in which the output is only connected to the Nvidia GPU, usage of integrated GPU's in the chipset or CPU is not possible. Advantages of this configuration could be access to Nvidia specific output features, such as the level of HDMI and Displayport support, such as deep color. It is possible for 3D to work with Optimus, as in Dell XPS.
For now, Nvidia has no plans to support Optimus on Linux.[3] This makes hardware acceleration impossible by the Nvidia adapter.
Optimus Enabled Notebooks
References
http://www.thinkdigit.com/Laptops-PCs/36-of-the-latest-laptops-from-Asus_4309.html
- ^ http://www.nvidia.com/object/optimus_technology.html
- ^ "On laptops that don't have that hardware mux you currently cannot use the NVIDIA GPU for display.", ', July 23, 2010, accessed November 27, 2010.
- ^ "We have no plans to support Optimus on Linux at this time.", ', February 10, 2010, accessed November 27, 2010.
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