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Epyc 7282 Memory bandwidth issues

Question asked by ksistof_bortkevic on Feb 25, 2020
Latest reply on Apr 29, 2020 by hardcoregames™



We seem to be having a problem with memory bandwidth using 2 Epyc 7282 CPUs with 4 DIMMS of HMA82GR7CJR8 RAM 16GB DDR4-3200 2Rx8 ECC REG DIMM HYNIX memory per socket on a Supermicro H11DSi board. We tried a couple of different benchmarks on Windows an Linux, they show the RAM Bandwidth as ~20 GB/s. We tried playing around with the BIOS settings and managed to get to ~30-40 GB/s. There are 4 DIMMs per socket, and some layouts work better than others. With one CPU and 8 DIMMs we get ~60 GB/s. Can anyone assist us with this issue?