ECC memory


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ECC memory

(Error-Correcting Code memory) A memory system that tests for and corrects errors automatically, very often without the operating system being aware of it, let alone the user. As data are written into memory, ECC circuitry generates checksums from the binary sequences in the bytes and stores them in an additional seven bits of memory for 32-bit data paths or eight bits for 64-bit paths. When data are retrieved from memory, the checksum is recomputed to determine if any of the data bits have been corrupted. Such systems can typically detect and automatically correct errors of one bit per word and can detect, but not correct, errors greater than one bit. See EOS memory, chipkill, checksum and parity checking.

               Errors      Errors               It Can      It CanMemory Type    Detect      Correct

  Non-parity     Nothing     Nothing

  Parity         1 bit       Nothing

  ECC            1-2 bits    1 bit
References in periodicals archive ?
Kingston's ValueRAM DDR2 ECC and Registered ECC memory modules are currently available in 256MB, 512MB, 1GB, and 2GB configurations.
8GHz processors with 2x 2MB L2 cache & 800MHz FSB (HT off), 2GB DDR2 ECC memory, 160GB SATA 7200RPM HDD, Microsoft Windows XP Pro SP2.
Congatec notes the need for ECC memory support in telecommunications, financial and banking applications to enhance overall system dependability and expects the small form factor and enhanced dependability of the conga-MA3E to unlock the market.
Kingston's ValueRAM DDR2 ECC and Registered ECC memory modules are currently available in 256 MB, 512 MB, 1 GB, and 2 GB configurations to support high-end computing.
Performance - Intel Pentium 4 processor, redundant gigabit Ethernet ports, DDR ECC memory, and hardware RAID guarantee maximum performance
Complementing the ARM1156T2-S core is a complete reference design with all of the necessary peripherals for implementing an embedded design, including LSI Logic's unique ECC Memory Protection core that provides high-performance and cost-effective soft-error protection for tightly coupled memories on ARM processors.
The model features IntelA Core or XeonA processors, dual 1 TB HP Z Turbo Drive G2(5, 6) for up to 2 TB of total storage, up to 32 GB ECC memory, dual Thunderbolt 3, dual cooling fans, and optional HP DreamColor UHD or FHD touch displays.
Redesigned from the inside out, the all-new Mac Pro features the latest Intel Xeon processors, dual workstation-class GPUs, PCIe- based flash storage and ultra-fast ECC memory.
7U SuperBlade SBI-7127RG-E - 2x MIC cards, dual Intel Xeon E5-2600 series processors, up to 256GB DDR3 1600MHz ECC memory, 4x FDR (56Gb) InfiniBand or 10GbE supported via optional mezzanine card, 1x SSD support, up to 120x MIC + 120 CPU per 42U SuperRack
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6 GHz, and up to 2 GB DDR SDRAM ECC memory with a 6.