Table 1.

Parameter definitions and values of memory-usage model for 3g and 4g technology.

	Parameter	Description	Value in B
			3g	4g
n (M, N)	mn	memory usage of one neuron object of type iaf_psc_alpha	1100
	m0n	memory overhead per neuron	0.33	0
	m+n	memory overhead per local neuron	16	24
	m∅n	memory overhead per non-local neuron	0
c (M, T, N, K)	mstatc	memory usage of one connection object of type static_synapse (3g) or static_synapse_hpc (4g)	48	16
	mstdpc	memory usage of one connection object of type stdp_pl_synapse (3g) or stdp_pl_synapse_hpc (4g)	48	24
	m0c	memory overhead per neuron	0.33
	m1c	memory overhead per neuron with one local target	96	24
	m>1c	memory overhead per neuron with more than one local target	160	128
	m∅c	memory overhead per neuron without local targets	0

The top part of the table summarizes the parameters relevant for the memory consumption due to the neuronal infrastructure _#1, the bottom part shows the parameters determining the memory consumption _c of the synaptic infrastructure. Lower case symbols m refer to the memory per object, where objects are neurons or connections, respectively. The columns “3g” and “4g” distinguish between the parameter values for the two kernel versions.