AddOn - Memory Upgrades 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model AA160D3N/16GK2 Cas Latency: 11 Voltage: 1.5V Buffered/Registered: Unbuffered Features: This Industry Standard 2x8GB DDR3-1600MHz DDR3-1600MHz Dual Rank Unbuffered 1.5V 240-pin CL11 UDIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. Our products are also guaranteed by federal law to not affect or void OEM warranties.