l i n u x - u s e r s - g r o u p - o f - d a v i s
Next Meeting:
July 7: Social gathering
Next Installfest:
Latest News:
Jun. 14: June LUGOD meeting cancelled
Page last updated:
2007 Apr 10 17:01

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] ECC memory --- is it worth it? (semi-OT)
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] ECC memory --- is it worth it? (semi-OT)

hajhouse wrote:
> På 2007-04-10, skrev Rick Moen:
>> Quoting hajhouse (hajhouse@houseag.com):
>>> I've never understood the distinction. What's different between
>>> registered and unregistered DIMMs?
>> Registered RAM has a buffer through which data are checked in and out of
>> the stick's address space, to help ensure data integrity.  It's
>> generally supported only on server boards.  Unregistered RAM is more
>> often referred to as "unbuffered".  See:
>> http://www.mushkin.com/doc/techSupport/papers/registered.asp
> I see. So then, for the strongest assurance of data integrity, one would
> choose registered ECC RAM.

Er, sort of.  Sure if most paranoid it adds something.  But the additional
buffer adds cost, complexity, and damages performance.  It's worth it
on servers mostly to allow for larger dimm counts.

For instance with non registered memory you often can have 4 low density
dimms, 2 high density dimms, or downclock the memory bus for 4 high
density dimms.  Registered memory allows for 8 high density dimms
at full clock rate.

So mainly it's a mechanism to allow for more dimms more than improving
reliability with a lower number of dimms.
vox-tech mailing list

LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
O'Reilly and Associates
For numerous book donations.