HP Z840 WorkstationIntel Xeon E5-2650v4 (2.2GHz, 30M Cache, 9.6GT/s QPI, Turbo, 12Core/24 Threads)16GB(2*8GB) DDR4-2133 MHz DDR4 ECC Registered RAM 1TB SATA Hard Drive 7200RPMOptical drive - SATA Super Multi DVD writerHP 15-In-1 Media Card ReaderGraphics - NVIDIA Quadro M5000 - 8.0GB GraphicsHP USB Keyboard ARAB-HP USB 1000dpi Laser MouseWindows 7 Professional 64 (available through downgrade rights from Windows 10 Pro 64) (This system is preinstalled with Windows 7 Professional software and also comes with a license and media for Windows 10 Pro software.)