HP 500B Micro Tower Business PC DESKTOP COMPUTER Intel (R) Pentium (R) Dual Core Processor E5700 (3.00 GHz 2MB L2 cache, 800MHz FSB Window 7 Intel G41 Express Microtower 2Gb 1333 MHz DDR3 SDRAM 2 DIMM 320GB 7200 rpm SATA 3.0 Gb/s SATA Supermulti Lightscribe DVD writer Integrated Intel Graphics Media Accelerator 4500 1 Microphone in 1 RJ45 1 VGA 1 Line in 1 Line out 2 additional Internal USB 2.0 ports on motherboard 1 full height PCI 2.3 1 full height PCIe x16 1 full height PCIe x1 Integrated High Definition audio with Realtek ALC662 codec Integrated Realtek RTL8193EL 10/100 Ethernet 28 Diagonal HD Ready Widescreen LCD Matrix