Dell Desktop Optiplex GX620 Pentium 4 Single-Core 3.80GHz Bus Speed 800MHz 1 MB Cache RAM 1GB 80GB No Optical Gigabit Enabled (1.00 Gbps) Local Area Network Capable Intel GMA 950 Dynamic Video Memory Technology 3.0 Microsoft Windows XP Professional (32-bit) License Only - No OS Installed Mini Tower Silver on Black