10.4.4.2.3 Optimization for High Speed or Low Power

High Speed results in a macro optimized for speed and area (width cascading).

Low Power results in a macro optimized for low power, but uses additional logic at the input and output (depth cascading). Performance for a low power optimized macro may be inferior to that of a macro optimized for speed. Some RAM configurations are not possible with depth cascading (such as 512 x 36), but low power optimization is a priority when the option is selected.