Feature 1Professional: Designed for DDR3 UDIMM compatible desktop computers with PCB material for long term stability. 21600MHz Frequency: DDR3 UDIMM memory type, 1600MHz frequency, 240Pin data interface, 64bit width, 1.35V/1.5V operating voltage. 3Plug and Play: Laptop memory is plug and play, simply install the memory to achieve faster speeds and higher capacities without the need to tweak for BIOS. 4Improved System Performance: Improve system performance by speeding up load times, improving system responsiveness, and increasing the system's ability to handle larger workloads. 5Stable Performance: All modules are quality assured tested to ensure reliable and dependable performance.Item Type:DDR31600MhzRAMMaterial: PCBMemory Type: DDR3 UDIMMFrequency: 1600MHzData Interface: 240PinBit Width: 64BitsOperating Voltage: 1.35V/1.5VApplicable: Desktop PC .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x DDR31600MhzRAMNote1. Components may change from batch to batch but performance remains the same2. Please verify the memory (RAM) specifications supported by your system prior to purchase to ensure compatibility.