Intel Xeon 6 Granite Rapids Memory Scaling Performance From 6 To 12 MRDIMMs

Written by Michael Larabel in Memory on 17 February 2026 at 10:00 AM EST. Page 4 of 10. 1 Comment.
Xcompact3d Incompact3d benchmark with settings of Input: Cavity. 8 x MRDIMM was the fastest.
Xcompact3d Incompact3d benchmark with settings of Input: Pipe Flow. 12 x MRDIMM was the fastest.
Xcompact3d Incompact3d benchmark with settings of Input: Channel FLow. 8 x MRDIMM was the fastest.
Xcompact3d Incompact3d benchmark with settings of Input: Cylinder Wake. 12 x MRDIMM was the fastest.
Xcompact3d Incompact3d benchmark with settings of Input: ABL-Atmospheric-Boundary-Layer. 12 x MRDIMM was the fastest.

It depends upon the software as well as the size of model and other factors, but for a number of the HPC workloads the performance benefits dropped off after eight MRDIMMs with this single socket Xeon 6980P test setup.

OpenFOAM benchmark with settings of Input: drivaerFastback, Small Mesh Size, Mesh Time. 8 x MRDIMM was the fastest.
OpenFOAM benchmark with settings of Input: drivaerFastback, Small Mesh Size, Execution Time. 10 x MRDIMM was the fastest.
OpenFOAM benchmark with settings of Input: drivaerFastback, Medium Mesh Size, Mesh Time. 12 x MRDIMM was the fastest.
OpenFOAM benchmark with settings of Input: drivaerFastback, Medium Mesh Size, Execution Time. 12 x MRDIMM was the fastest.
OpenFOAM benchmark with settings of Input: drivaerFastback, Large Mesh Size, Mesh Time. 12 x MRDIMM was the fastest.
OpenFOAM benchmark with settings of Input: drivaerFastback, Large Mesh Size, Execution Time. 12 x MRDIMM was the fastest.

The OpenFOAM computational fluid dynamics software scaled nicely up to twelve MRDIMMs with the larger models.

OpenRadioss benchmark with settings of Model: Bumper Beam. 8 x MRDIMM was the fastest.
OpenRadioss benchmark with settings of Model: Bird Strike on Windshield. 8 x MRDIMM was the fastest.
OpenRadioss benchmark with settings of Model: Rubber O-Ring Seal Installation. 8 x MRDIMM was the fastest.
RELION benchmark with settings of Test: Basic, Device: CPU. 12 x MRDIMM was the fastest.
LAMMPS Molecular Dynamics Simulator benchmark with settings of Model: 61k Atoms. 8 x MRDIMM was the fastest.

For those trying to reduce costs with today's memory pricing, going for eight MRDIMMs at least initially would be one way to achieve most of the performance without as much of an initial investment.

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