Product Detail Sleek, shiny and powerful black-and-silver desktop with 2.3 GHz AMD Phenom X4 960 quad-core 750 GB hard drive, 8 GB installed RAM (16 GB max), 16x multi-format/dual-layer LightScribe DVD drive 54g Wi-Fi networking (802.11b/g); Gigabit Ethernet; ATI Radeon HD 3200 graphics (256 MB dedicated) Connections: 6 USB, 2 FireWire, 1 VGA, 1 headphone/line-out, 1 microphone, 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 A6750F Desktop PC 2.3 GHz AMD Phenom X4 9650 Quad-Core Processor, 8 GB RAM, 750 GB Hard Drive, DVD Drive, Vista Premium" is best product for you. We recommended HP Pavilion A6750F Desktop PC 2.3 GHz AMD Phenom X4 9650 Quad-Core Processor, 8 GB RAM, 750 GB Hard Drive, DVD Drive, Vista Premium