ECC memory
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Error correction code memory is a type of computer data storage that uses an error correction code to detect and correct n-bit data corruption which occurs in memory.
ECC DIMMs typically have nine memory chips on each side, one more than usually found on non-ECC DIMMs (some modules may have 5 or 18).
In 1982 this 512 KB memory board from Cromemco used 22 bits of storage per 16-bit word to perform single-bit error correction.
Registered memory
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Registered memory is computer memory that has a register between the DRAM modules and the system's memory controller. A registered memory module places less electrical load on a memory controller than
ECC memory
…Intel's choice to forgo ECC support on desktop platforms, when contemporary AMD desktop platforms could use (but not necessary enable the ECC feature on) registered DIMMs with ECC support. Many CPUs use error-correction codes in the on-chip cache, including the Intel Itanium, Xeon, Core and Pentium (since P6 microarchitecture…
One 64 GiB DDR5-4800 ECC 1.1 V registered DIMM (RDIMM)