HP Pavilion a6700f Phenom X4 9150e 1.8GHz 4GB 500GB DVD&plusmn;RW DL Vista Home Premium HP Pavilion a6700f Phenom X4 9150e 1.8 GHz Desktop PC General Features: Microsoft Windows Vista Home Premium 64-bit pre-installed w/CoA AMD Phenom X4 9150e 1.8 GHz Quad-Core processor AMD Live Smarter Digital Entertainment 4 GB DDR2 PC2-6400 SDRAM (supports up to 8 GB) 500 GB SATA/300 (3 Gb/s) hard drive 16x DVD RW DL drive with LightScribe Technology