Genuine Windows 7 Home Premium 64-bit, Intel Pentium Processor G620, 2.60GHz, Intel H61 PCH Chipset, 3MB Cache, DMI 5.0GT/s, 4GB PC3-10600 DDR3 SDRAM memory (2x2GB) (expandable to 8GB), 500GB 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, Intel HD Graphics, Up to 1696MB Total Available Graphics Memory as allocated by Windows, Onboard 10/100/1000Mbps Gigabit Ethernet Support, Wireless LAN 802.11b/g/n featuring Single-band (2.4Ghz) 2x2 MIMO technology, Beats Audio Studio Quality Sound -- Hear music the way the artist intended, Integrated speakers, 2 SODIMM (DDR3) (occupied), 2 SO-DIMM (occupied), 1 MXM Graphics Module PCI Express slot (available), 2 PCI-E x1 mini socket slots (one available), 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), Subwoofer Out (rear), Line-out (rear), HP wireless keyboard and wireless optical mouse, Integrated HD webcam and built-in microphone, 1920x1080 Multi-touch enabled 23\" diagonal widescreen Full HD LED backlit display