Here is the info on the CPU's, and they list them all as having three memory channels. I've yet to see any details on the chipset used in the new systems. It's not easy finding any *real* info on them. :-( http://ark.intel.com/Compare.aspx?ids=41313,39721,47917,40200,47925,47922,47920, Zane At 5:38 PM +1000 8/16/10, Christopher Collins wrote: >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: > > > 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/ |