I'll keep this short: This 4 gigabyte bar serves as a memory expansion for my "Fujitsu LIFEBOOK A512 NG 39.6 cm (15.6-inch) notebook (Intel Pentium 2020M, 2.4GHz, 4GB RAM, 500GB HDD, DVD, without operating system ) black ". Was easily recognized and working properly - in my case Linux Mint Cinnamon 17.1 (64 bit).