We usually check with HWU.netapp.com for physical specifications for the controller model(s).
For FAS3140, it appears there is :
One physical processor with two (logical) processing cores for each controller, 2 Physical processor as HA Pair.
Considering this, I don't think there is any scope for second physical processor.
For Memory it's 8GB for HA Pair, so each controller has 4GB maximum.