Dell Desktop Optiplex GX620 Pentium 4 Single-Core 3.00GHz Bus Speed 800MHz 2 MB Cache RAM 512 MB 40GB DVD-ROM Floppy Disk Drive Gigabit Enabled (1.00 Gbps) Local Area Network Capable Microsoft Windows XP Professional (32-bit) License Only - No OS Installed Desktop Silver on Black Modem Installed