HP Z1 G2 All-in-One Touchscreen Workstation; 10-point Touchscreen 27-inch diagonal IPS LED backlit widescreen LCD with 2MP 1080p webcam (2560 x 1440); 400W 90% Efficient power supply; Intel Xeon E3-1245v3 3.4 GHz (up to 3.8 GHz) 8MB GT2 84W 4C HT CPU; Intel HD Graphics P4600; 1TB 7200 RPM SATA Hard Drive; 8GB DDR3-1866 ECC (2x4GB) Unbuffered RAM; Slim tray-load SuperMulti DVDRW; HP Wireless Keyboard & Mouse; Windows 7 Professional 64 installed with Windows 8.1 Professional License; 3/3/3 Warranty; HP ENERGY STAR Qualified Configuration