After receiving on time ... joy. // Upon opening the package ... sadness. Indeed, after installation: my laptop will not boot. I wanted to double the memory 4GB ELPIDA 2Rx8 PC3- 10600S my laptop Asus K53SD to go from 4GB to 8GB (maximum expected). Alas! Does not work with the original memory. Even reversing the memory modules. Do not work alone. I gave the original memory, and the pc left. I am disappointed, I lost 19,69 ... I console myself with the thought that this strip could have worked. I will look elsewhere to find my happiness. Good luck to those who control this memory module.