MRDIMM 8800MT/s vs. DDR5-6400 Memory Performance With Intel Xeon 6

Written by Michael Larabel in Memory on 3 October 2024 at 04:00 PM EDT. Page 3 of 5. 11 Comments.
ACES DGEMM benchmark with settings of Sustained Floating-Point Rate. Xeon 6980P 2P - MRDIMM-8800 was the fastest.
RELION benchmark with settings of Test: Basic, Device: CPU. EPYC 9684X 2P was the fastest.
LULESH benchmark with settings of . Xeon 6980P 2P - MRDIMM-8800 was the fastest.
QMCPACK benchmark with settings of Input: Li2_STO_ae. Xeon 6980P 2P - MRDIMM-8800 was the fastest.
OpenRadioss benchmark with settings of Model: Chrysler Neon 1M. EPYC 9684X 2P was the fastest.

For smaller HPC mini apps and workloads less sensitive to memory bandwidth, the MRDIMM gains were less impactful but still measurable.

High Performance Conjugate Gradient benchmark with settings of X Y Z: 144 144 144, RT: 60. Xeon 6980P 2P - MRDIMM-8800 was the fastest.

Stressing HPCG on the dual Intel Xeon 6 server with MRDIMMs was very exciting. Similar to Intel's reported MRDIMM benefits, running HPCG with MRDIMM 8800 memory yielded 33% better performance than DDR5-6400!

NAS Parallel Benchmarks benchmark with settings of Test / Class: SP.C. Xeon 6980P 2P - MRDIMM-8800 was the fastest.
NAS Parallel Benchmarks benchmark with settings of Test / Class: IS.D. Xeon 6980P 2P - MRDIMM-8800 was the fastest.
NAS Parallel Benchmarks benchmark with settings of Test / Class: MG.C. Xeon 6980P 2P - MRDIMM-8800 was the fastest.

There were some pretty nice gains out of the MRDIMM-equipped server in NPB.

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