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Corsair Vengeance 16GB (2x8GB) DDR3 1600 MHz (PC3 12800) Desktop Memory 1.5V

Product ID: B006EWUO22 Condition: New

Selected Option: Black Memory

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Product Description

Corsair Vengeance 16GB (2x8GB) DDR3 1600 MHz (PC3 12800) Desktop Memory 1.5V

16GB (2x8GB) DDR3 for AMD and Intel Dual Channel processors
Speed: 1600MHz; Timing: 10-10-10-27 ; Designed for use with all motherboards with quad DDR3 memory channels
Pin Out: 240 Pin; Voltage: 1.5V; Compatibility- Intel and AMD Processor platforms
Density: 16GB (2x8GB Module) and Limited Lifetime Warranty
SPD Latency 9-9-9-24 , SPD Speed 1333MHz, SPD Voltage 1.5V

This is a limitation of a 32-bit operating system. In Windows, the Windows memory manager is limited to a 4 GB physical address space. Most of that address space is filled with RAM, but not all of it. Memory-mapped devices (such as your video card) will use some of that physical address space, as will the BIOS ROMs. After all the non-memory devices have had their say, there will be less than 4GB of address space available for RAM below the 4GB physical address boundary. MacOS X Tiger and Leopard are both 64-bit operating systems and will not experience this problem. Neither will 64-bit versions of Windows XP or Vista or Windows 7.