16384MB (2x8192MB) RDIMMs, 400 MHz, 1Gb Stacked DRAM

Model: 4524

IBM - Memory - 16 GB : 2 x 8 GB - DIMM 240-pin - DDR2 - 400 MHz / PC2-3200 - registered - ECC

Double data rate (DDR) memory techniques increase the data rate by transferring data on both the rising edge and the falling edge of the clock signal. DDR DIMMs use a "2x" prefetch scheme so that two sets of 64-bit data are referenced simultaneously. DDR2 is the generation of DDR technology. The primary benefit is the potential for faster throughput. In addition, the DDR2 improves the power consumption of the DIMM because it works on a lower voltage. DDR2 consumes less power than DDR and offers a higher range of throughput because it has halved the speed of the memory core (thereby reducing power consumption), but offsetting that by doubling the number of prefetches from the memory core to the I/O buffers.

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