Phenom 9500 720GBHD 3GB HP Pavilion m8400f Phenom X4 9500 2.2 GHz Media Center PC General Features: Microsoft Windows Vista Home Premium pre-installed w/COA AMD Phenom X4 9500 2.2 GHz Quad-Core Processor 3 GB DDR2 RAM 720 GB (2 x 360GB) SATA hard drive 16x SuperMulti DVD RW DL drive with LightScribe Technology 15-in-1 memory card reader NVIDIA GeForce 8500 GT PCI Express video card