To disable BRAM power optimization, add the following to the XDC.
To disable power_opt for all components, use the following command:
set_power_opt -exclude_cells [get_cells my_module/my_bram1]
We recommend only excluding the BRAM elements that are failing timing or are associated with timing critical path.
To understand the impact of the BRAM power_opt functionality: (Xilinx Answer 56336)