PC3-12800 DDR3-1600 SODIMM memory offerings let you upgrade your system's standard memory capacity to improve overall ThinkPad or ThinkCentre system performance. Adding additional memory is a cost-effective way to help boost your system's performance and enhance its ability to run more programs simultaneously. Choice of available memory sizes for DDR3 UDIMM memory. Choice of single-pack. Increased performance over PC3-10600 DDR3-1333 memory. Test-proven 100% compatibility listed for supported systems. Meets stringent Lenovo reliability standards for memory products. Lenovo limited warranty. Lenovo memory installed in a new Lenovo system automatically assumes system warranty