Lenovo Desktop ThinkCentre M58 Core 2 Duo Dual-Core 2.93GHz Bus Speed 1066MHz 3 MB Cache RAM 2GB 250GB SATA-300 (3 Gbit/s) DVD Multiburner Gigabit Enabled (1.00 Gbps) Local Area Network Capable eSATA (External Serial Advanced Technology Attachment) Intel GMA 4500 Shared Video Memory (UMA) Microsoft Windows Vista Business License Only - No OS Installed U.S. English Desktop Small Form Factor Black