Please note - our RAM/Memory is mixed brand, and part number may vary - but all RAM is thoroughly tested and working just before shipping. Brands may include Samsung, Apacer, Hynix, Micron, Kingston, Crucial, or other. All removed from ex-business machines, and stress tested to ensure perfect working order. Discounts on multiple sticks! Free, fast postage from one of the UK's largest suppliers of RAM/Memory - with 1000s of sticks in stock at any time. Confused about compatibility? Drop us a message, and we will be able to help.