In the space environment, during the image acquisition, the hyperspectral payloads need to process a data flow, which could swing between hundreds of Mbit/sec and some Gbit/sec. In this scenario, one of the key aspects is to find the correct dimension of the memory buffers, based on access speed and dimension, in order to optimize the payload and guarantee the time allocation of the whole sequence of tasks, which have to be executed between the rough data sending by the detector and the moment in which the processed data are sent to the platform. The hyperspectral payload called CHIME (Copernicus Hyperspectral Imaging Mission for the Environment), implemented by the Leonardo S.p.A.