Model - HP Prodesk 400 G4, Processor - 7th Gen Intel Core i3 7100, Processor Clock Speed - 3.9GHz, CPU Cache - 3MB, Chipset - Intel H270, RAM - 4GB, RAM Type - DDR4 2133MHz, Max RAM Support - 32GB, RAM Slot - 2, HDD - 1TB HDD, HDD Type - SATA 7200 RPM Serial ATA, Graphics Chipset - Intel HD 630, Graphics Memory - Shared, Optical Device - DVD RW, Keyboard - HP USB Keyboard, Mouse - HP USB Optical Mouse, Networking - LAN, Display Port - VGA, Audio Port - Combo, USB Port - 4 x USB2.0, 4 x USB3.1 Gen 1, Operating System - Free Dos, Others - Turbo Drive (M.2 PCIe); 1 M.2 2230 for wireless NIC; PCI Express x 16 (v3.0)(wired as a x4) 4.2", full height 6.6" length, 35 W max power; PCI Express x 16 (v3.0) 4.2" full height, 6.6" length, 75 W max power, Part No - 1NU86PA/1XG57AV, Warranty - 3 year