eMachines ET1831-01 Celeron 420 1.6GHz 3GB 320GB DVD&plusmn;RW DL Windows 7 Home Premium (Black) eMachines ET1831-01 Celeron 420 1.6 GHz Desktop PC General Features: Microsoft Windows 7 Home Premium 64-bit pre-installed w/CoA Intel Celeron 420 1.6 GHz processor NVIDIA GeForce 7050 chipset 3 GB DDR2 RAM 320 GB SATA hard drive 16x SuperMulti DVD RW DL drive with Labelflash NVIDIA GeForce 7050 integrated graphics Integrated 8-channel (7.1) high definition audio