Genuine Windows 7 Home Premium 64-bit, AMD Dual-Core A4-3400 Accelerated Processor, 2.70GHz, AMD A55 FCH Chipset, 1MB Cache L2, 4.0 GT/s HT3, 4GB PC3-10600 DDR3 SDRAM memory (2x2GB) (expandable to 8GB), 1TB (Terabyte) 7200RPM Serial ATA hard drive, Slot-load SuperMulti DVD Burner, 8x DVD-R, 8x DVD+RW, 6x DVD-RW, 6x DVD R DL, 5x DVD-RAM, 8x DVD-ROM, 24x CDR, 24x CDRW, 24x CD-ROM, AMD Radeon HD 6410D integrated graphics, Up to 2040MB Total Available Graphics Memory as allocated by Windows 7, Onboard 10/100/1000Mbps Gigabit Ethernet Support, Wireless LAN 802.11b/g/n, Beats Audio Studio Quality Sound -- Hear music the way the artist intended, Integrated speakers, 2 SO-DIMM (occupied), 2 SO-DIMM (occupied), 1 PCI-E x1 mini socket slots (occupied), 6-in-1 memory card reader (left side) supports Secure Digital (SD, SDHC), MultiMedia Card, Memory Stick, Memory Stick Pro, Headphone/Mic (left side), 7 USB 2.0 ports (2x3.0 left side, 4x2.0 rear, 1x2.0 back bottom wireless dongle) (6 available), RJ45 (10/100/1000 LAN) (rear center), Line-out (rear), HP wireless keyboard and wireless optical mouse, Integrated HD webcam and built-in microphone, 1600x900 20" diagonal widescreen HD LED backlit display,