AWS FPGA DDR4 bandwidth vs burst length

                         HDK               SDAccel
  burst length   DDRA,B,D   DDRC   bank1,2,3   bank0
 -------------- ---------- ------ ----------- -------
             1        8.1    7.7         3.4     3.1
             2       15.2   14.3         6.6     5.9
             4       15.2   14.3        12.6    11.4
             8       15.2   14.3        15.2    14.3
            16       15.2   14.3        15.2    14.3