HP Pavilion Desktop (AMD A4-5000 Quad-Core Processor, 4GB DDR3 RAM, 500GB Hard Drive, DVD/CD, Windows 8.1) (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com Processor: AMD A4-5000 APU 1.5GHz, 4GB DDR3 RAM (2 slots, Supports up to 16 GB (unbuffered) on 64-bit systems), 500GB SATA Hard Drive (7200rpm), AMD Radeon HD 8330 graphics (combined with the processor) Integrated Realtek ALC662, 10/100/1000 Gigabit Ethernet, 802.11b/g/n wireless, SuperMulti DVDRW; 7-in-1 memory card reader Front Panel: (2) USB 2.0, (1) Headphone, (1) Microphone; Rear Panel: (1) DVI-D, (1) VGA, (2) USB 3.0, (2) USB 2.0, (1) Audio: Line-in, (1) Audio: Line-out, (1) Microphone, (1) LAN port Windows 8.1 operating system; Power supply: External 65W Max; HP USB keyboard and optical mouse; 1 x external 5.25" bay, 1 x internal 3.5" bay