AMD vs Intel memory managemement

[keith smith]

I found this in an on-line discussion:

Ganged = dual channel mode for ram. All cores get access to 100% of the ram.



unganged = single channel. Each core gets access to a stick of ram.

Is this correct?


------------------------

Keith Smith

--- On Mon, 6/3/13, Nathan England <nathan at nmecs.com> wrote:

From: Nathan England <nathan at nmecs.com>
Subject: Re: AMD vs Intel memory managemement
To: "Main PLUG discussion list" <plug-discuss at lists.phxlinux.org>
Date: Monday, June 3, 2013, 1:35 AM



#yiv807825942 p, #yiv807825942 li {white-space:pre-wrap;}




 
Yeah, it's a wonderful thing AMD calls "unganged" mode. I have 8 GB of ram in my server and the motherboard has enabled "unganged" mode to be more efficient. CentOS only recognizes 5.8 GB of ram and I cannot turn off unganged mode.
 
I love it...
 
</sarcasm>




On Sunday, June 02, 2013 17:46:19 keith smith wrote:

 




Hi,

After that great thread on 32bit vs 64bit, I was wondering if it would be beneficial at this point to drill down to the CPU level : AMD vs Intel.

We had a great thread a while ago the AMD CPU, however I do not think that thread covered memory management.

I almost went for an AMD CPU this go around (I have a couple from prior purchases), however after hearing that AMD does some weird memory management at the core level, assigning memory by the bank to each core, I thought I would go with an Intel CPU.

If I understand this correctly, It sounds like under some or most circumstances the server will lose a portion of the total memory because under AMD RAM is assigned at the core level and bank level.  I assume Intel uses memory as a pool.  Need memory just grab some until it is gone. 

Any thoughts on this?

Thanks!

------------------------
Keith Smith



-- 
 
 
 
Regards,
 
Nathan England
 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
NME Computer Services http://www.nmecs.com
Nathan England (nathan at nmecs.com)
Systems Administration / Web Application Development
Information Security Consulting
(480) 559.9681
 
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