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DDR4 memory specifications

DDR4 memory will come in two sizes. DDR4 memory using Single-ended Signaling has been confirmed to have a transfer rate of 1.6 to 3.2Gbps, while DDR4 memory based on Differential Signaling technology will have a transfer rate of 6.4Gbps. Since it is essentially impossible to implement both interfaces in a single DRAM, DDR4 memory will be available in both conventional SE signaling and differential signaling-based form factors.

According to a number of semiconductor industry stakeholders, DDR4 memory will be Single-ended Signaling (SE) and Differential Signaling (DS). Mr. Phil Hester of AMD also confirmed this. It is expected that the two standards will launch different chip products, so we will see two incompatible memory products in the DDR4 memory era