Dell OptiPlex 755 All-in-One Pentium Dual-Core E2160 1.8GHz 2GB 160GB DVD&plusmn;RW 17" LCD Windows 7 Home Premium Dell OptiPlex 755 Pentium Dual-Core E2160 1.8 GHz All-in-One PC General Features: Ultra small form factor design Microsoft Windows 7 Home Premium pre-installed w/CoA Intel Pentium Dual-Core E2160 1.8 GHz processor Intel Q35 (ICH9D0) Express chipset 2 GB DDR2 SDRAM (4GB max. supported) 160 GB SATA hard drive DVD RW Drive Intel Graphics Media Accelerator 3100