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Topic Title: Sanity check: dual core/dual opteron system
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Created On: 05/24/2006 11:53 AM
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 05/24/2006 11:53 AM
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jmclizard
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Joined: 05/24/2006

Hello,
Just to make sure I understand some of the key issues in selecting/building an Opteron system (940 socket):
1) a leading 2 indicates an SMP capable CPU
2) there are dual core versions of these chips
3) there are motherboards that support the dual core/dual cpu configuration (may need a bios upgrade)

Other issues: memory selection, enough power, etc.

Thanks for any advice.
 05/24/2006 12:09 PM
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TheReturnOfAZ
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the leading 2 indicates the number of CPUs that can be used... not cores. for instance a 165 is dual core (and s939 for that matter) but cannot be used with another 165

some are dual core some are not... basically i BELIEVE anything that ends in a 0 or 5 and is > x50 is dual core

if you have a dual socket board of course it will support dual CPUs; most motherboards will support dual core CPUs.

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 05/24/2006 08:45 PM
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jmclizard
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quote:

Originally posted by: TheReturnOfAZ
the leading 2 indicates the number of CPUs that can be used... not cores. for instance a 165 is dual core (and s939 for that matter) but cannot be used with another 165

some are dual core some are not... basically i BELIEVE anything that ends in a 0 or 5 and is > x50 is dual core

if you have a dual socket board of course it will support dual CPUs; most motherboards will support dual core CPUs.



I dug a little more and found the model number/feature matrix. That cleared up most of my questions.
You confirmed that the leading 2 (or 8) indicates the 'wayness' of the processor ( my SMP reference) and also only the s940 is multi-cpu capable. (I saw that there are embedded s940 100 series chips -not going after that one!. I can now focus my research on motherboard/memory/case selection. Thanks for the info and as always, any suggestions or advice is appreciated.

Regards
 05/24/2006 11:27 PM
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Bitey
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Joined: 10/07/2003

Have alook in the opteron forum for more info.

But a quick summary.

All dual sokcet opterons are named like 2xx, require registered memory and are socket 940.

Supermicro, iWill and tyan are the best manufacturers of quality dual socket boards, msi and asus also make (cheaper) dual socket boards.

Some boards will have memory connected per cpu, some only connect memory to one CPU.
Some boards require 2 cpu's to use all the boards features like sli, and both network interfaces.

A good dual opteron will have memory per cpu giving you 2x 128 bit memory interface...eg double that of a normal single socket board.

They cost a fair bit more than normal boards, and usualy require a full tower size case and 550 watt eps ssi power suplly , though a 650 watt would be a better idea(use a good brand)

Having said that you can get a dual opteron in a SFF case, Iwill does them.


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