Hi Thom

On Server1 there is a total of 16GB.
I've set up SQL to be able to access 12GB of that (leaving 4GB for Windows as I understand it).
It's my understanding that SSAS will take a proportion of the 12GB for it's own use.

This server is using the Developer edition of SQL2012 (we're upgrading the SQL tomorrow to 2016 Developer).

::edit::
Not sure if it makes any difference but both of these servers as virtual machines so we can ask for more RAM if necessary.