Re: RAM speed difference?

["Scott R. Ehrlich" <user=81@nabble.blu.org>]

 On Sat, 22 Dec 2007, Henry Hall wrote: 

> Scott Ehrlich wrote: 
>> I'm pricing out some servers (from Dell) and deciding between their 1955 
>> blade server and a 2950 2U server.   I learned the 1955 has only 4 RAM 
>> slots, whereas the 2950 has 8.  Thus, I could populate with 4 x 4 GB 
>> modules, or 2 x 2 GB modules (cost savings).  But, for compute-intensive 
>> work, where the majority of a program will work between CPU and RAM, how 
>> much of a cost, compute-wise, is there, between 4 GB and 2 x 2 GB? 
>> 
>> I could go with 10 blades, or 10 2950 machines.   The benefit of the 
>> 2950 would be more slots for RAM and, with its architecture, easier to 
>> manage and expand (I work with two of the 2950 machines anyway, and have 
>> seen the 1955). 
>> 
>> I'm not a/the programmer.  I'm just relaying, and using my resources to 
>> get the best hardware that fits the need. 
>> 
>> Thanks for insight/feedback. 
>> 
>> Scott 
> 
> Just as a quick note, besides the amount of RAM (and its cost per GB per 
> stick), it's also good to know how the "memory bank interleave" 
> (http://en.wikipedia.org/wiki/Memory_organisation#Interleaved) is set up 
> for each of the systems. 
> 
> Henry 
>