Lenovo Desktop ThinkCentre M58 Core 2 Duo Dual-Core 2.66GHz Bus Speed 1066MHz 3 MB Cache RAM 4GB 250GB DVD-RW Fast Enabled (100.00 Mb/s) Local Area Network Capable Intel GMA 4500 Shared Video Memory (UMA) Microsoft Windows Vista Business License Only - No OS Installed Desktop Small Form Factor Black