Timetec Hynix IC 4GB DDR4 2133MHz PC4-17000 Non ECC Unbuffered 1.2V CL15 1R8 Single Rank 288 Pin UDIMM Desktop PC Computer Memory Ram Module Upgrade (4GB) DDR4 2133MHz PC4-17000 288-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 Desktop Computer, Not for Laptop For Selected Acer , Alienware , ASRock , ASUS/ASmobile , BCM , Biostar , Dell , DFI , EVGA , Fujitsu , Gigabyte , HP/Compaq , Lenovo , MEDION , MSI , NEC , QNAP , Shuttle , Supermicro Guaranteed  Lifetime warranty from Purchase Date Free technical support (support@timetecinc.com) MON - FRI 9AM-6PM PST Timetec website: https://www.timetecinc.com/