Works perfectly, my 2009 Vaio is now capable of multiple tabs open, including excel, autocad, etc. Had 2x2gb 1066mhz originally and bought 2x4gb 1600mhz, the computer seems faster and windows seems to run smoother. It came well packed and arrived fast. It was as simple as plug and play. Sony VAIO VPCCW17FX. Thank you Chinese people, thank you Kllisre.
