Blur o transparens drar faktiskt inte processorkraft eftersom det är GPU som hanterar detta..och den drar inte mer energi heller..
läs gärna en noggrann genomgång om detta:
http://www.tomshardware.com/2007/01/29/xp-vs-vista/page11.html
"Obviously, the requirements for displaying all elements in 3D, rotating and moving them aren't enough to heat up graphics processors. This might also be a result of Windows Vista's more advanced implementation of ACPI 2.0 (and parts of 3.0), which allows the control of power of system components separately