  LPDDR5 is the latest low-power DRAM standard and expected to be used in
various application fields. The vendors have published promising peak
bandwidths up to 50 % higher than those of the predecessor LPDDR4. In this
paper we evaluate the best-case and worst-case real bandwidth utilization of
different LPDDR5 configurations and compare the results to corresponding LPDDR4
configurations. We also show that an upgrade from LPDDR4 to LPDDR5 does not
always bring a bandwidth advantage and that some LPDDR5 configurations should
be avoided for specific workloads.
