Infographic – memory buying guide for Romley 2-socket servers

For servers based on the Intel plan of record

UPDATE: 06/30/2012: v1.21 – added 1333MHz/1600MHz speed info
UPDATE: 06/30/2012: v1.21_ibmsys_1_0 – IBM System x memory
UPDATE: 07/01/2012: v1.21_ibmsys_1_1 – IBM System x memory
UPDATE: 07/06/2012 – non-viability of LRDIMMs
UPDATE: 07/06/2012 – viability of HyperCloud

Here is a graphical illustration of how to choose memory for 2-socket Romley servers.

Thanks to suggestions by Diya Soubra for an infographic, and for providing proposed drafts for such a format. A number of ideas have been taken from those proposals. Thanks also for the feedback on the language in the infographic. To follow the discussion, checkout the comments section for:
https://ddr3memory.wordpress.com/2012/06/25/memory-buying-guide-when-to-use-rdimms/
Memory buying guide – when to use RDIMMs on Romley ?
June 25, 2012

The graphic does not include the decision-making for Romley servers like the IBM x3750 M4 server – which are outside the Intel PoR (plan of record) – which have memory bus tweaks which make them perform faster than regular Romley 2-socket servers. Perhaps a separate graphic can be produced for those servers, once HyperCloud becomes available on them.

right-click – Save As – to save as PNG (image) format
right-click – Save As – to save as PDF format

This infographic is based on the speed guide information provided by IBM and other OEM docs. It also includes some of the other information presented here previously.

OEM-specific versions of infographic

Some of the memory options may not be available for some OEMs.

Here is a version for IBM System X memory (for a server like the x3650 M4) – where the options that are not available have been crossed out:

right-click – Save As – to save as PNG (image) format
right-click – Save As – to save as PDF format

IBM System X memory options not available are marked with an X:

– 1600MHz RDIMMs only at 1.5V, but max is 8GB (no 16GB, 32GB)
– 32GB RDIMM at 1.5V not available

Reference:
http://www-03.ibm.com/systems/x/options/memory/ddr3/specs.html
IBM DDR3 Memory for System x

List of references

On the non-viability of 16GB HyperCloud 1.35V, and why 1.35V should be available for 32GB HyperCloud:

https://ddr3memory.wordpress.com/2012/06/28/memory-buying-guide-including-1-35v-memory-for-romley/
Memory buying guide – including 1.35V memory for Romley
June 28, 2012

On why 1600MHz varieties of LRDIMMs/HyperCloud may not be available currently (may not help unit sales):

https://ddr3memory.wordpress.com/2012/06/27/where-are-the-1600mhz-lrdimmshypercloud-for-romley/
Where are the 1600MHz LRDIMMs/HyperCloud for Romley ?
June 27, 2012

When RDIMMs are preferable to HyperCloud/LRDIMMs:

https://ddr3memory.wordpress.com/2012/06/25/memory-buying-guide-when-to-use-rdimms/
Memory buying guide – when to use RDIMMs on Romley ?
June 25, 2012

On the non-viability of 16GB LRDIMMs and 32GB RDIMMs:

https://ddr3memory.wordpress.com/2012/06/19/why-are-16gb-lrdimms-non-viable/
Why are 16GB LRDIMMs non-viable ?
June 19, 2012

https://ddr3memory.wordpress.com/2012/06/20/non-viability-of-32gb-rdimms/
Non-viability of 32GB RDIMMs
June 20, 2012

UPDATE: 07/06/2012: non-viability of LRDIMMs
UPDATE: 07/06/2012 – viability of HyperCloud

On the non-viability of LRDIMMs in general:

https://ddr3memory.wordpress.com/2012/07/05/examining-lrdimms/
Examining LRDIMMs
July 5, 2012

On the viability of HyperCloud:

https://ddr3memory.wordpress.com/2012/07/03/examining-netlist/
Examining Netlist
July 3, 2012

LRDIMMs bring with them a set of problems:

– HyperCloud latency, cost and IP superiority trumps LRDIMMs
– usually they are priced similarly (IBM memory price list)

On the risk factors for LRDIMM:

https://ddr3memory.wordpress.com/2012/06/05/lrdimms-future-and-end-user-risk-factors/
LRDIMMs future and end-user risk factors
June 5, 2012

https://ddr3memory.wordpress.com/2012/06/15/why-are-lrdimms-single-sourced-by-inphi/
Why are LRDIMMs single-sourced by Inphi ?
June 15, 2012

And these where the IBM/HP and other OEM speed information is presented:

https://ddr3memory.wordpress.com/2012/05/24/memory-options-for-the-hp-dl360p-and-dl380p-servers-16gb-memory-modules/
Memory options for the HP DL360p and DL380p servers – 16GB memory modules
May 24, 2012

https://ddr3memory.wordpress.com/2012/05/24/memory-options-for-the-hp-dl360p-and-dl380p-servers-32gb-memory-modules/
Memory options for the HP DL360p and DL380p servers – 32GB memory modules
May 24, 2012

https://ddr3memory.wordpress.com/2012/05/25/memory-options-for-the-ibm-system-x3630-m4-server-16gb-memory-modules-2/
Memory options for the IBM System x3650 M4 server – 16GB memory modules
May 25, 2012

https://ddr3memory.wordpress.com/2012/05/25/memory-options-for-the-ibm-system-x3630-m4-server-32gb-memory-modules/
Memory options for the IBM System x3650 M4 server – 32GB memory modules
May 25, 2012

https://ddr3memory.wordpress.com/2012/05/27/what-are-ibm-hcdimms-and-hp-hdimms/
What are IBM HCDIMMs and HP HDIMMs ?
May 27, 2012

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15 Comments

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15 responses to “Infographic – memory buying guide for Romley 2-socket servers

  1. For people that do not have the time to go through multiple manuals and technical websites, this one page summary gives them, in a cool format, the majority of information they need to make an educated decision about the type of memory to use in their server.

    Given that the memory now costs 5X more than the motherboard then one needs all the information they can get.

    • Thanks for giving the idea for an infographic.

      I also borrowed your use of using different columns for the 1 DPC, 2 DPC, 3 DPC – while on the same background total memory template.

  2. Thank you. This is very useful. Only question is whether we can “accept” voltage and capacity numbers published by LRDIMM manufacturers. This may be marketing hype.

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