DDR3 1333MHz PC3-10600 240-Pin Non-ECC Unbuffered 1.5V CL9 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