16GB Total memory using 4pc of 4GB 1600MHz Module 240pin dimm DDR3 12800 NON ECC. Lifetime warranty for exchange. BRAND CMS We don't use OEM or Generic modules to avoid incompatibility issues. Guaranteed to work or you get all of your money back including shipping.
Max
Memory: 4 GB with 32-bit OS 16 GB with 64-bit
OS
Expansion: 4 Sockets HP/Compaq Pavilion p6653w MODULES MAY BE INSTALLED ONE AT A TIME; however, they must be added in like pairs to take advantage of dual-channel support. Maximum configurations require a 64-bit operating system.