E5-1620 V3 3.5 10M 2133 CPU, 8GB DDR3 Memory, 1TB HDD, Nvidia Quadro K2200 4 GB Graphics, Win 8.1 Pro operating system, DVD RW ODD, 3 years warranty,Achieve the performance you need with next generation Intel Xeon processors for up to 8 processor cores in one system. Get serious about graphics and reach peak productivity with access to a breadth of AMD & NVidia professional graphics from entry to high-end 3D.Optimize this HP Z440 for peak performance. HP Performance Advisor configures your system with updated settings and drivers to help maximize performance. 700W 90% Efficient Chassis , latest DDR4-2133 ECC memory