This SK Hynix RAM set is a great addition to any computer system. With a total capacity of 4MB split between four modules, each with a capacity of 1MB, this DDR3 SDRAM set runs at a bus speed of PC3L-12800 (DDR3L-1600). The modules come in DIMM form factor and feature ECC memory for added reliability. The model number for this set is PC3L-12800U and it is designed to work with most modern computer systems.