Full Details from Amazon.com : http://www.amazon.com/gp/product/B009AEYBYI?tag=onigi-20<br /><br />Samsung 4GB DDR3 PC3-12800 1600MHz 204-Pin SODIMM Laptop Memory Module RAM. Model M471B5273DH0-CK0<br /><br />Cas CL11 <br />Voltage 15 <br />4GB Single Stick Dual rank if bought in pairs <br />204 pins <br />Samsung Part number M471B5273DH0-CK0
