According to this KB MS recommends 2GB of memory per CPU core: http://technet.microsoft.com/en-us/library/dd346700(v=exchg.141).aspx
I'm transitioning to new CAS servers, and in my new servers (which haven't been added to the production load balancer yet) have 12 CPUs and only 16 GB of memory.
Why does MS recommend 2GB per core? What issues will I have if I stay at 16GB? I'm considering between disabling 4 cores, or ordering more memory.