HP 4GB (1x4GB) Dual Rank x8 PC3-12800E (DDR3-1600) Unbuffered CAS-11 Memory Kit
HPE 4GB DDR3 1600MHz, 4 GB, 1 x 4 GB, DDR3, 1600 MHz, 240-pin DIMM
HPE 4GB DDR3 1600MHz. Component for: PC/Server, Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR3, Memory speed: 1600 MHz, Memory form factor: 240-pin DIMM, CAS latency: 11