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Subject: Re: what is ECC ram?

Author: Robert Hyatt

Date: 12:30:58 05/28/01

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On May 28, 2001 at 11:27:06, Jonas Cohonas wrote:

>On May 28, 2001 at 10:58:01, Robert Hyatt wrote:
>
>>On May 28, 2001 at 01:20:33, John Dahlem wrote:
>>
>>>I see there is both ECC DDR ram and regular, but ECC costs twice as much. What
>>>is the difference between them?
>>
>>ECC includes a hamming code for each 64 bit "word".  This code is used to
>>correct single-bit errors on the fly, and detect double-bit errors.  It is
>>most often used in servers where higher reliability is desired, at a higher
>>price.
>
>Would you reccoment them over "normal" ram?
>
>Regards
>Jonas

Not particularly.  All of my quad xeons have ECC ram.  But they are designed
as high-reliability server machines where random memory errors would corrupt
data and cause serious problems...




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