Set of six Hynix 2GB DDR3 SDRAM RAM modules designed for desktop computers, specifically for Apple MacPro models. Each module has a capacity of 2GB, a total capacity of 12GB for all six modules. The modules have a form factor of DIMM and a bus speed of PC3-10600 (DDR3-1333). They also feature ECC memory for error correction. The model is HMT325U7BFR8C and has 240 pins for installation. I haven't tested them but they were 100% working when I took them out of my computer years ago and have since sat on a shelf.