DDR3 Desktop Memory 4GB/8GB — 1333 / 1600 / 1866MHz (PC3-10600/12800/14900), 240‑Pin DIMM, 1.5V

Module and kit options: 1x4GB = 4GB total (one 4GB module); 2x4GB = 8GB total (two 4GB modules); 1x8GB = 8GB total (one 8GB module); 2x8GB = 16GB total (two 8GB modules). Available speeds and PC3 ratings: 4GB DDR3 1333MHz / PC3-10600; 4GB DDR3 1600MHz / PC3-12800; 4GB DDR3 1866MHz / PC3-14900. 8GB DDR3 1333MHz / PC3-10600; 8GB DDR3 1600MHz / PC3-12800; 8GB DDR3 1866MHz / PC3-14900. Form factor and electrical: standard desktop 240-pin DIMM, DDR3 module operating at 1.5V. Compatible with motherboards that accept DDR3 240-pin DIMM memory at the listed frequencies.