Value of memory

[Robert Moskowitz]

I have a server that is only running bind 9.8.2 (Centos 6.5).  It has 
2Gb memory and free reports ~1.7Gb used.

I am looking at replacing this server with an armv7 board running 
Redsleeve (until Centos 7 is out and stable for armv7).  I have a choice 
of boards, one with 1Gb memory ($60) and one with 2Gb memory ($90).

This server servers out my zones and supports the couple handfull of 
systems on my net.  I would like to eventually get to DNSSEC, but that 
is another stalled project.

About the only meaningful difference between the two boards (btw, 
Cubieboard2 and Cubietruck) for my needs is the memory.  I know more 
memory is better, but how much better?

Oh, why the move to arm?  Power consumption.  ROI for the C2 board is 
one year just on power saving.