2 - 4GB modules. Taken from working system.The SK Hynix 8GB (2x4GB) 1Rx8 PC3L-12800S-11-13-B4 RAM Module is a high-quality memory module that offers a total capacity of 8GB, divided into two 4GB modules. Made with DDR3 SDRAM technology, this module operates at a bus speed of PC3-12800 (DDR3-1600) for efficient performance. The SO-DIMM form factor makes it compatible with a wide range of devices, while the SK hynix brand ensures reliability and stability for your computer's memory needs.