Energy inefficient. Lenovo offers a simple office notebook with a Pentium dual-core processor for 339 Euro (~$425). The operating system must be chosen for there is none. Our test will show whether Lenovo delivers a cheap office notebook or a weak low-priced notebook with the IdeaPad G580-MBBG3GE.
http://www.notebookcheck.net/Review-Lenovo-IdeaPad-G580-Notebook.81260.0.html