[X4U] Mac Pro RAM question

[Christopher Collins]

Actually, the chipset used in the new Mac Pros (H55) I believe uses pairs or memory modules, not triples.

Depends on the chipset what is required.

cjc


On 16/08/2010, at 11:59 AM, Zane H. Healy wrote:

> 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