Mình mới nâng cấp máy, dư ra cái case QuadCore Q6600, ram DDR3 4g, hdd 160g, dvd, wifi 150Mbps. 3tr9, chi tiết: https://www.nhattao.com/threads/case-dell-vostro-230-g41-cpu-quadcore-q6600-ram-4gb-wifi-n.3481171/