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
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References in periodicals archive ?
The Pro WS X570-ACE marries the new CPUs and their PCIe 4.0 connectivity to ECC RAM and management features not normally seen outside of pricey server-grade gear.
The 2017 iMac Pro also houses 128GB of ECC RAM and a Radeon Pro Vega 64 graphics card with 16GB of HBM2 memory.
The company is currently ready to ship its new iMac Pro all-in-one desktop PCs which come with Intel Xeon processors with up to 18 cores, AMD Vega 64 graphics, 128GB DDR4 ECC RAM and 4TB PCIe based SSD drives.
2 POWER9-compatible CPU sockets 16 DDR4 ECC RAM slots 3 PCIe 4.0 x 16 slots 2 PCIe 4.0 x 8 slots 2 Broadcom Gigabit Ethernet ports Optional Microsemi SAS 3.0 controller 4 USB 3.0 ports (2 external and 2 on internal header) 1 USB 2.0 port 1 external RS-232 port 1 internal RS-232 port header 1 ASpeed BMC with OpenBMC 1 VGA video port.
Upgrading from the previous generation of DDR3 RAM, these NAS are equipped with 4GB (expandable to 64GB) DDR4 ECC RAM. DDR4 is the next evolution in DRAM, bringing even higher performance with migration to higher speed, more robust control features while improving energy economy with reduction in memory power demand.
equipped with 4GB ECC RAM, which is expandable to 32GB.
It has four memory slots supporting up to 32 GB of DDR3 ECC RAM, and can accommodate up to two internal 2.5-in.
A single 2.0GHz PowerPC G5 processor with 512MB of PC3200 ECC RAM, a single 80GB Apple Drive Module with expandability for up to 750GB, dual Gigabit Ethernet on-board, FireWire 800 and USB 2.0 and unlimited client licences of Mac OS X Server is priced at GBP2,399.
-- dual 2.0 GHz PowerPC G5 processors with 1GB of PC3200 ECC RAM, a single 80GB Apple Drive Module with expandability for up to 750GB, dual Gigabit Ethernet on-board, FireWire 800 and USB 2.0, and an unlimited client license of Mac OS X Server for a suggested retail price of $3,999 (US); and
The XServe G5 is available in three configurations: a single 2.0 GHz PowerPC G5 processor device with 512Mb of PC3200 ECC RAM, a dual 2.0 GHz PowerPC G5 processor based unit with 1GB of PC3200 ECC RAM, and cluster-optimized dual 2.0 GHz PowerPC G5 processors with 512Mb of PC3200 ECC RAM.
Previously, (http://www.ibtimes.com/apples-pro-imac-slated-release-end-2017-2526759) IBTimes learned that one iMac model could come with an Intel Xeon E3-1285 processor and ECC RAM. Intel's new Xeon E3 processors are based on Skylake and Kaby Lake architecture.