The photo-absorption spectra of the silver, gold and silver-gold alloy nanoclusters in tetrahedral (T d ) and icosahedral (I h ) symmetry group are computed with the release 1. and DYE12 84 datasets. For each system, a preliminary DFT computation is done with the corresponding density-functional approximation at def2-TZVPP level. It is followed by the computation of the vertical excitations using 10 -4 Hartree as standard perturbation threshold and 8 eV for the spectral range.