DDR3 1600MHz PC3-12800 240-Pin Unbuffered Non-ECC 1.5V CL11 Dual Rank 2Rx8 based 512x8 Module Size: 32GB KIT(4x8GB Modules) Package: 4x8GB ; Voltage JEDEC standard 1.5V PCB Color Green; all Timetec products are high quality and rigorously tested to meet stringent standards For DDR3 Desktop Compatible with Intel and AMD CPU, Not for Laptop Guaranteed Lifetime warranty from Purchase Date and Free technical support based on United States