DDR5-6400 vs. DDR5-4800 R-DIMM Performance For Threadripper 9980X / 9970X CPUs

Written by Michael Larabel in Memory on 8 August 2025 at 10:40 AM EDT. Page 5 of 9. 19 Comments.

👁 Xcompact3d Incompact3d benchmark with settings of Input: input.i3d 193 Cells Per Direction. Threadripper 9980X was the fastest.

👁 Xcompact3d Incompact3d benchmark with settings of Input: X3D-benchmarking input.i3d. Threadripper 9980X was the fastest.

👁 OpenFOAM benchmark with settings of Input: drivaerFastback, Small Mesh Size, Execution Time. Threadripper 9980X was the fastest.

👁 OpenFOAM benchmark with settings of Input: drivaerFastback, Medium Mesh Size, Execution Time. Threadripper 9980X was the fastest.

The OpenFOAM computational fluid dynamics software and other CFD applications typically rely on as much memory bandwidth as possible for decent performance.

👁 Algebraic Multi-Grid Benchmark benchmark with settings of . Threadripper 9980X was the fastest.

👁 ACES DGEMM benchmark with settings of Sustained Floating-Point Rate. Threadripper 9980X was the fastest.

👁 Quicksilver benchmark with settings of Input: CORAL2 P1. Threadripper 9980X @ DDR5-4800 was the fastest.

Hopefully all these data points are useful if needing to argue to your boss or significant other the need to upgrade from DDR5-4800 to DDR5-6400 at the same time as Threadripper 9000 series.

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URL: https://www.phoronix.com/review/threadripper-9000-ddr5-6400-4800/5

⇱ DDR5-6400 vs. DDR5-4800 R-DIMM Performance For Threadripper 9980X / 9970X CPUs - Phoronix

DDR5-6400 vs. DDR5-4800 R-DIMM Performance For Threadripper 9980X / 9970X CPUs