HP 251-A123WB Pentium J2900 Quad-Core 2.41GHz 4GB 1TB Mini-Tower & 21.5" Monitor Mini-tower design, Intel Pentium J2900 Quad-Core 2.41GHz processor, Burst Frequency: 2.66 GHz, L2 Cache: 2 MB 4 GB DDR3 memory, 1 TB Serial ATA hard drive, DVDRW SATA drive Intel HD Graphics, Integrated HD Audio, 10/100 Ethernet LAN, Wireless LAN 802.11b/g/n Microsoft Windows 10 Home 64-bit pre-installed 21.5" HP 22uh Monitor