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Upgrade the memory in your desktop system using the 4GB DDR3 1600 MHz UDIMM Memory Kit from Crucial. This memory kit features a total capacity of 4GB, which is made up of two 2GB modules. Each module is compatible with systems that have an available 240-pin memory slot and support a clock speed of 1600 MHz (PC3-12800). For power, it operates using 1.5V. Moreover, it has a CAS latency of 11 and is built with a 256M x 64 configuration.