HP Z2 Tower G4 Workstation (2WU64EA) - Intel Xeon W-2123 Processor (8.25M Cache, 3.60 GHz, up to 3.90 GHz, 4 cores), 16GB DDR4 2666MHz ECC RAM (2 x 8GB, 6 slots free, 256GB Max), 1TB 7200RPM Hard Drive, DVD-RW Drive, Integrated Realtek HD ALC221 Audio, Integrated Intel I219-LM PCIe Gigabit Ethernet, Connectivity: Front: 1 x Headset, 4 x USB 3.1 (1 charging), 2 x USB 3.1 Type-C, Rear: 6 x USB 3.1 Gen 1, 2 x RJ-45 (1 GbE), 1 x Audio Line-out, 1 x Audio Line-in, 2 x PS/2, Includes HP USB Slim Keyboard and Mouse Combo, Windows 10 Pro 64-Bit