Operating System : Windows 10 Home & Pro MAR Chipset : Intel Q270 Processors : Intel 6th & 7th Gen Core i3, i5, i7, Intel Pentium G, Intel Celeron G Memory Support : Four (4) SODIMM slots , Up to 64 GB DDR4-2400 Hard Drive : SATA 7200 rpm or SSD, PCIe NMVe TLC SSD Removable Media : HP 9.5 mm, G3 600 SFF DVD-Writer or HP 9.5 mm, G3 600 SFF DVD-ROM Expansion Bays : Internal: One (1) 2.5-inch, One (1) 3.5-inch, External: One (1) slim ODD, One (1) SD Card Reader Expansion Slots : One (1) Turbo Drive M.2 PCIe x1-2230, One (1) Turbo Drive M.2 PCIe x4-2280, Two (2) PCI Express x16 (v3.0); 1 wired as an x4 Graphics : Intel HD Graphics Audio : Conexant CX20632 codec Communications : Realtek RTL8201N FtE I/O Ports : Front: Two (2) USB 2.0, Two (2) USB 3.1, One (1) USB Type C 3.1Audio I/O,  Rear: Four (4) USB 3.1, Two (2) USB 2.0 Audio I/O, Two (2) DP, RJ-45 Input Devices : Standard Keyboard (USB) Power : 80 PLUS Bronze 180W active PFC or 80 PLUS Platinum 180W active PFC Dimensions : 269.24 x 93.98 x 297.18 mm Weight : 4.53 kg