Timetec Hynix IC 4GB DDR4 2133MHz PC4-17000 Non ECC Unbuffered 1.2V CL15 1Rx8 Single Rank 260 Pin SODIMM Laptop Notebook Computer Memory Ram Module Upgrade (4GB) DDR4 2133MHz PC4-17000 260-Pin Unbuffered Non ECC 1.2V CL15 Single Rank 1Rx8 based 512x8 JEDEC standard 1.2V (1.14V ~ 1.26V) Power Supply Module Size: 4GB Package: 1x4GB For Laptop/Notebook, Not for Desktop For Selected Acer , Alienware , ASRock , ASUS/ASmobile , BCM , Clevo , Dell , Fujitsu , Gigabyte , HP/Compaq , Intel , Lenovo , MSI , NEC , Samsung , Supermicro , ZOTAC Guaranteed  Lifetime warranty from Purchase Date Free technical support (support@timetecinc.com) MON - FRI 9AM-6PM PST Timetec website: https://www.timetecinc.com/