Arch Memory Certified for HP 4 GB (1 x 4 GB) 204-Pin DDR3L-1600 PC3L-12800 So-dimm RAM Arch Memory is a Registered Trademark of Arch Computer, LLC Works in all HP Hewlett Packard computers that support this specific speed and capacity. If unsure, please contact us; we can verify it when you provide us your make and model computer. 204 pin SODIMM DDR3L RAM Upgrade Limited, Lifetime Warranty through the Seller