Adamanta 8GB (1x8GB) Laptop Memory Upgrade for Dell Inspiron 15 5551 DDR3 1600Mhz PC3-12800 SODIMM 2Rx8 CL11 1.5v Notebook DRAM 8GB ( 8GBx1 ) 1600 Mhz Non-Parity/Non-ECC Unbuffered Memory 204pin Standard Voltage DDR3 Dual Rank Module. Every module is backed by a lifetime limited warranty. We always have hundreds in stock! Free technical support from our experienced technicians. Every single module is fully tested by the manufacturer. May not work on all devices. Please check your device's specifications before purchasing. May require a x64 bit OS to upgrade. Our experienced technicians can verify if these parts will work for you.