Dell OptiPlex 755 Pentium Dual-Core E2160 1.8GHz 2GB 160GB DVD&plusmn;RW Windows 7 Home Premium Mini-Tower Dell OptiPlex 755 Pentium E2160 1.8 GHz Mini-Tower PC General Features: Mini-Tower form factor Microsoft Windows 7 Home Premium pre-installed w/CoA Intel Pentium Dual-Core E2160 1.8 GHz processor 800 MHz FSB speed, 1 MB L2 cache 2 GB DDR2 RAM (8 GB maximum) 160 GB SATA hard drive DVD RW SATA drive No floppy drive Integrated Graphics Media Accelerator 3100