A typical self-consistency or molecular-dynamics run requires a maximum memory in the order of O double precision complex numbers, where
For hybrid DFTs, additional storage of Ox double precision complex numbers is needed (for Fourier-transformed Kohn-Sham states), with Ox = xNqMN1N2N3 and x = 0.5 for Γ -only calculations, x = 1 otherwise.
The memory required by the phonon code follows the same patterns, with somewhat larger factors m, p, q.