VS828UT I HP Compaq 6000 Pro MicroTower PC SystemTechnical Specifications Audio Audio Integrated High Definition audio with Realtek 2 channel ALC261 codec Expansion slots Expansion slots 1 full height PCI; 2 full height PCIe x1; 1 full height PCIe x16 Input devices Keyboard USB standard keyboard Pointing device USB 2 button optical scroll mouse Memory Memory slots 4 DIMM Memory upgrade Upgradeable to 16 GB Standard memory capacity 2 GB Standard memory 2 GB 1333 MHz DDR3 SDRAM Standard memory speed