This DELL OptiPlex 330 Mini Tower computer comes with Intel Dual Core 2.4GHz Processor, 2048MB DDR2 Memory, 250GB Hard Drive, DVD Rom Optical Drive, Microsoft Windows 7 Home Premium (32-bit) Operating System and 1 year Distributor Warranty. Buy this Desktop and Get Free Shipping on a Dell OptiPlex 330 Mini Tower Dual Core 2.4GHz, 2048MB Memory, 250GB HDD - Refurbished for $159.99 at Rakuten.com!