DDR3 offers a data rate of 1600MHz, while DDR4 offers that of 2133MHz, improving performance by 30%. Supply voltage is also reduced from 1.35V in DDR3 to 1.20V in DDR4. Reducing power consumption and heat generation, DDR4 provides improved data bus termination, bus inversion, internal grouping of banks and the supply of the wordline boost voltage via the module connector.
DDR4 also offers error protection of the command/address bus, allowing transmission errors of the main control signals to be detected. The 260 signal and voltage pins allow users to use modules both with or without ECC support and in the same pin assignment, providing a more flexible system specification.
The Swissbit DDR4 ECC SODIMM is sampling now and will be available in 2015.
