If all the cores are fully loaded what you get is the nominal clock speed for each core, not the turbo frequency. For example, for 2410M it' ll be 2.3GHz.
As my observations in case duel cores fully loaded it will boost up to 2.60 GHz
i5-480M has 2.93 GHz maximum turbo frequency for one or both CPU cores:
i5-2410M has 2.7 GHz max turbo frequency for 2 CPU cores: