Even if a strict comparison with experiments remains difficult since computations are performed in gas phase on a tetrahedral symmetry structure, it is important to get an indication on how a density functional is accurate in predicting the energy of the Ag 120 plasmon band. For this nanocluster size, experiments locate it at 3.73 eV. The PBE0 and PBE0-1/3 global-hybrid approximations provide the best estimate of this reference with a deviation of about 0.2 eV (3.93 and 3.96 eV, respectively), while range-separated hybrids overshoots it by 1.0 eV. It is worth to note that for global hybrids, an error of 0.2 eV is in line with their usual performance, especially when they are applied to compute the UV/vis properties of organic chromophores (see for instance Table and S3 in Supporting Information or Ref. 94 for more comprehensive investigations). However, an error of 1.9 eV as found with range-separated hybrids remains large but justified by the too large excess of EXX. Indeed, as shown in several benchmark investigations, range-separated hybrids tend to overshoot excitations with a local character. They remain however essential to accurately estimate excitations with a strong intra-of inter-molecular charge transfer. We recall that up to here all the computations were performed within the Tamm-Dancoff approximation. As depicted by Figure in Supporting Information, the simplified full TDDFT framework (sTD-DFT) is found to be a possible solution to reduce the large energy deviations observed for Ag 120 . At PBE0 level, the plasmon band is shifted by -0.58 eV (3.35 eV). It introduces a larger error of almost ∼0.4 eV with respect to experiments. We can expect that such a deviation of about 0.6 eV could be favorable to range-separated hybrids, reducing thus the large energy error found with the sTDA approach.