If you are using a Dell* EMC server you may have lower throughput results compared to the throughput presented in the Intel® Acceleration Stack Quick Start Guide for Intel Programmable Acceleration Card with Intel Arria® 10 GX FPGA when running the DMA AFU example due to a different configuration used in your server.
To get similar results please use a hardware configuration in your server as explained in the Base Configurations for Dell-EMC Servers for Use with Intel PAC with Intel Arria 10 GX FPGA. Take note of the system's RDIMM memory ranks.