Product Detail Top-of-the-line multimedia desktop featuring 2.5 GHz Intel Core 2 Quad Q8300 with four lightning fast execution cores 750 GB hard drive, access to optional HP Pocket Media Drive, 8 GB RAM (max), Blu-ray Disc playback and DVD-RW/CD burning Draft-N Wi-Fi (802.11a/b/g/n); Gigabit Ethernet; Nvidia GeForce 9600 GS graphics (768 MB dedicated) Connectivity: 6 USB, 2 FireWire, 1 VGA, 1 HDMI, 1 DVI, digital audio output, surround sound speaker output, 15-in-1 memory card reader Pre-installed with Windows Vista Home Premium with SP1 (64-bit version); includes keyboard and mouse . The "HP Pavilion Elite M9520F Desktop PC 2.5 GHz Intel Core 2 Quad Q8300 Processor, 8 GB RAM, 750 GB Hard Drive, Blu-ray Drive, Vista Premium" is best product for you. We recommended HP Pavilion Elite M9520F Desktop PC 2.5 GHz Intel Core 2 Quad Q8300 Processor, 8 GB RAM, 750 GB Hard Drive, Blu-ray Drive, Vista Premium