Power management

In computing this is known as PC power management and is built around a standard called ACPI which superseded APM.

This requires a file the size of the installed RAM to be placed on the hard disk, potentially using up space even when not in hibernate mode.

Hibernate mode is enabled by default in some versions of Windows and can be disabled in order to recover this disk space.

Graphics processing unit (GPUs) are used together with a CPU to accelerate computing in variety of domains revolving around scientific, analytics, engineering, consumer and enterprise applications.

Experiments show that conventional processor DVFS policy can achieve power reduction of embedded GPUs with reasonable performance degradation.

GreenGPU is implemented using the CUDA framework on a real physical testbed with Nvidia GeForce GPUs and AMD Phenom II CPUs.

Practical tests showed that reclocking a GeForce GTX 480 can achieve a 28% lower power consumption while only decreasing performance by 1% for a given task.