2pcs 4GB PC3-10600 CL9 1333MHz NON ECC Module 240PIN DIMM NON REGISTER. This computer can use DDR3-12800 running at 1600Mhz as well. Genuine CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from CMS A 64-bit operating system is required to utilize more than 4GB of memory.
Max Memory: 16 GB Expansion 4 Sockets
Compatible with: HP/Compaq Pavilion a4308f, a4316f, h8-1060jp, h8-1080jp MODULES MAY BE INSTALLED ONE AT A TIME; however, they must be added in like pairs to take advantage of dual-channel support. If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). Maximum configurations require a 64-bit operating system.