8GB 2X4GB Memory Ram Compatible with Dell Studio 15 1558 Notebooks Ddr3 by CMS A29

2pc of 4GB PC3-10600 CL9 16c 256x8 DDR3-1333 204pin SODIMM. Genuine CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from CMS. Compatible with: Compatible with Dell Studio 15 (1558) Maximum Memory: 8 GB SOCKETS: 2 MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel mode, if supported. If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). Maximum configurations require a 64-bit operating system.