[X4U] Mac Pro RAM question

[Zane H. Healy]

At 6:25 PM -0700 8/15/10, Ronald Steinke wrote:
>On Aug 15, 2010, at 3:38 PM, Russell McGaha wrote:
>
>>Zane;
>>	For the BEST performance you need the 'pairs' to be matched.
>>
>>Russell
>
>According to MacTracker and Datamem.com all of the Mac Pro models 
>have 4 or 8 RAM sockets. By my thoughts, it would be better to 
>install RAM in matched pairs to get the best performance from them. 
>That means that you would install equal value modules in the 
>matching sockets in each bank, ie: Equal value modules in sockets 
>A-1 and B-1 and the same for each pair of sockets until you run out 
>of space or money.
>
>I am wondering how you came to understand that either 3 or 6 RAM 
>modules would be recommended.

While they have 4 slots in a single CPU model, and 8 slots in the 
dual CPU model, they are designed such that you have 'triple channel 
memory'.  Putting 4 or 8 sticks in works, but you degrade your 
performance.

Zane



-- 
| Zane H. Healy                    | UNIX Systems Administrator |
| healyzh at aracnet.com              | OpenVMS Enthusiast         |
|                                  | Photographer               |
+----------------------------------+----------------------------+
|                     My flickr Photostream                     |
|          http://www.flickr.com/photos/33848088@N03/           |