4GB (1x4GB) Single Rank x4 PC3-12800 (DDR3-1600) Registered CAS-11 Memory Kit, Refurbished
HPE 676331R-B21, 4 GB, 1 x 4 GB, DDR3, 1600 MHz, 240-pin DIMM
HPE 676331R-B21. Component for: Laptop, 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, ECC