16GB Total memory using 4pc of 4GB 1333MHz Module 240pin dimm DDR3 10600 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 6000 Pro Small Form Factor

000 Pro Small Form Factor


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.