HP Pavilion Elite M9515F Desktop PC (2.5 GHz AMD Phenom X4 9850 Quad-Core Processor, 8 GB RAM, 750 GB Hard Drive, Blu-ray Drive, Vista Premium) (Discontinued by Manufacturer) Top-of-the-line multimedia desktop featuring 2.5 GHz AMD Phenom X4 9850 with four lightning fast execution cores 750 GB hard drive, access to optional HP Pocket Media Drive, 8 GB RAM (16 GB maximum), 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