Was told this would be compatible with my old Aspire 3. After first boot did not finish I started to have doubts. Second boot loaded everything and am very satisfied with improved boot-up speed etc.
Though it did not help in the laptop I installed it in it was not the fault of this RAM. Said device is a dead dog with Windows installed as proved by many reviews on Google. I'm sure the RAM is good as this device is running quite well with Linux Mint installed on it.