According to an embodiment, energy management system includes estimating module, preparing module and controller. The image processing procedure includes a procedure to generate second image data expanded into the pixels of the image output device by enlarging first image data expanded into pixels and contained in the rendering record, and a compression procedure that compresses the second image data. One embodiment of the method obtains a system address that conveys a physical address within the computer system, decodes the system address to determine a target channel controller in the computer system, and identifies at least one memory buffer device associated with the target channel controller.