[SI-LIST] Re: DDR2 vs. DDR3
- From: Jennifer Maharani <jennifer.maharani@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 23 Nov 2009 15:55:43 +0100
Many thanks Hermann. I look forward to you next post.
Jenni
On Nov 23, 2009, at 2:57 PM, Hermann Ruckerbauer
<hermann.ruckerbauer@xxxxxxxxxxxxx
> wrote:
> Hello,
>
> I cutted one page out of my "Memory interface" training which has the
> key differences between different Memory generations listed.
> As the list does not support attachements I have put it on my website
> under downloads/presentations.
>
> Hope this link works:
> http://www.eyeknowhow.de/index.php?option=com_rokdownloads&view=folder&Itemid=17&id=2:presentations
>
> Due to the differences on the CA bus on DIMM there are quite some more
> special things on DDR3 (e. g. Write levelization) which are quite
> complex and would require some more explanation.
> If no need some more background there just let me know ...
> I anyhow wanted to make this table a little bigger and add things like
> pre-fetch, MRS features, ... So I guess during this week I can post an
> updated table ...
>
>
>
> Hermann
>
> EKH - EyeKnowHow
> Hermann Ruckerbauer
> www.EyeKnowHow.de
> Hermann.Ruckerbauer@xxxxxxxxxxxxx
> Veilchenstrasse 1
> 94554 Moos
> Tel.: +49 (0)9938 / 902 083
> Mobile: +49 (0)176 / 787 787 77
> Fax: +49 (0)3212 / 121 9008
>
>
>
> Arun Kumar P N schrieb:
>> Hi Jenni,
>>
>> DDR3 using 8n-prefetch architecture and DDr2 using 4n-prefetch
>> architecture.
>>
>> For 8n-prefetch architecture, the internal core will operate at n
>> frequency,
>> IO buffer operate at 4n frequency at the last the last data
>> frequency will
>> be double the IO buffer frequency.ie.,8n.
>>
>> Example, DRAM core frequency = 100MHz
>> IO buffer frequency = 4*100MHz
>> Data frequcny(sample at both raising and falling edge) =
>> 2*4*100MHz.
>>
>> For 4n-prefetch architecture, the IO buffer frequency will be
>> double the
>> core frequency.
>>
>> I hope this will be helpful for you.
>>
>> Regards,
>>
>> Arun Kumar P N
>>
>>
>>
>> -----Original Message-----
>> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-
>> bounce@xxxxxxxxxxxxx] On
>> Behalf Of Jennifer Maharani
>> Sent: Monday, November 23, 2009 5:59 PM
>> To: si-list@xxxxxxxxxxxxx
>> Subject: [SI-LIST] DDR2 vs. DDR3
>>
>> Dear all,
>>
>> What are the differences between the two other than the speed?
>>
>> Many thanks,
>> Jenni
>> ------------------------------------------------------------------
>> To unsubscribe from si-list:
>> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>>
>> or to administer your membership from a web page, go to:
>> //www.freelists.org/webpage/si-list
>>
>> For help:
>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>
>>
>> List technical documents are available at:
>> http://www.si-list.net
>>
>> List archives are viewable at:
>> //www.freelists.org/archives/si-list
>>
>> Old (prior to June 6, 2001) list archives are viewable at:
>> http://www.qsl.net/wb6tpu
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------
>> To unsubscribe from si-list:
>> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>>
>> or to administer your membership from a web page, go to:
>> //www.freelists.org/webpage/si-list
>>
>> For help:
>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>
>>
>> List technical documents are available at:
>> http://www.si-list.net
>>
>> List archives are viewable at:
>> //www.freelists.org/archives/si-list
>>
>> Old (prior to June 6, 2001) list archives are viewable at:
>> http://www.qsl.net/wb6tpu
>>
>>
>> ---
>> ---------------------------------------------------------------------
>>
>>
>> Eingehende eMail ist virenfrei.
>> Von AVG uberpruft - www.avg.de
>> Version: 9.0.709 / Virendatenbank: 270.14.77/2520 - Ausgabedatum:
>> 11/22/09 20:40:00
>>
>>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
