Dell Pentium IV CPU Processor 533FSB, 512K, 2.26 GHz - C1427 Brand: Intel Computer Type: Desktop PC Socket Type: Socket 478 Clock Speed: 2.0GHz to 2.4GHz or 2000+ to 2400+ Processor Type: Intel Pentium 4 Compatible Models:Optiplex 170L, OptiPlex GX260, OptiPlex GX260 Desktop, OptiPlex GX260 Mini-Tower, OptiPlex GX260 Small Form Factor, OptiPlex GX270, OptiPlex GX270 Desktop, OptiPlex GX270 Mini-Tower, OptiPlex GX270 Small Form Factor, OptiPlex SX260, OptiPlex SX270, OptiPlex SX270N, PowerEdge SC400, Precision WorkStation 360 Desktop, Precision WorkStation 360 Mini-Tower,