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In preparation for a new version of INM CM (Institute of Numerical Mathematics Climate Model) we conduct an evaluation of several k - e (either with standard dissipation equation or relaxation one) based on extensive set of DNS (Direct Numerical Simulation), LES (Large-Eddy Simulation), and laboratory experiments datasets as well as previously introduced benchmarks such as GABLS1 and GABLS2. Evaluation was carried out within a uniform numerical formulation. The role of stability functions, extended dissipation equation and steady-state solutions on closure performance were also evaluated.