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 HP Z620, aimed at customers in financial services, video, animation, architecture and midrange CAD, provides up to 16 processing cores, up to 96GB of ECC memory, up to 11TB of high-speed storage and up to NVIDIA Quadro 6000 or dual NVIDIA Quadro 5000 graphics.
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1b internal ECC memory is replaced by block in the external memory dedicated for ECC.
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To support these, HP Workstations are tested to run a large number of ISV applications and are equipped with ECC Memory, which is important in avoiding soft errors in manufacturing.
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.
"The Mac Pro features an advanced system architecture, new faster processors and our best-ever graphics options to deliver a faster, more powerful system that our professional customers are going to love."The new Mac Pro includes Intel Xeon processors running at speeds up to 2.93 GHz, each with an integrated memory controller with three channels of 1066 MHz DDR3 ECC memory that delivers up to 2.4 times the memory bandwidth while cutting memory latency up to 40 percent.** Every Mac Pro comes standard with the NVIDIA GeForce GT 120 with 512MB of GDDR3 memory, a high-performance graphics card with nearly three times greater performance when compared to the previous generation system.*** An optional ATI Radeon HD 4870 is available for even more performance.