Bought as an extension of a Medion notebook (Intel N2840) with Hynix 2GB. For this purpose I have 4GB chewed for 35 from Samsung. Samsung did not get along with Hynix and the notebook remained with a message from Windows 8.1 with Beng, ("wants to fix me"), hanging. Then I wanted to try Crucial. Accidentally I caught the Hynix slot. Now I have 8GB. Samsung and Crucial therefore get along very well. It may be that this is a cheap Hynix is installed, perhaps.