Time evolution of the power spectra of the turbulent kinetic energy (blue) and magnetic energy (red) for the four magneto-hydrodynamical (MHD) simulations. The time evolution is represented by the color grading: light colors correspond to early times, while the darkest shade corresponds to the last snapshot of the simulation. The time interval between each shade is 5000 s for MHD_64, 1000 s for MHD_128, 500 s for MHD_256, and 300 s for MHD_512. The average quasi-steady state kinetic energy power spectrum for the hydrodynamical simulation HD_512 is shown in green.