Intel Core i7 Based SSL CAD Workstation Core i7-4765, i7-4770, i7-4790X, i7-4960X X79, Z87, Z97 chipsetDDR3-1600, DDR3-2400, Dual Gigabit LAN4 TB 6Gbs 7200 RPM SATA Hard drivesNVidia Quadro K2000 graphics w2 GB GDDR5USB 3.0 Optional RAID 0, 1, 5 or other disk arraysWindows 10 Professional 64 bitDual or optional triple slot PCI Express x16