Revisiting DDR5-6400 vs. MRDIMM-8800 Performance With Intel Xeon 6 "Granite Rapids"

Written by Michael Larabel in Memory on 18 September 2025 at 10:40 AM EDT. Page 3 of 5. 12 Comments.

👁 Timed Linux Kernel Compilation benchmark with settings of Build: allmodconfig. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Timed Node.js Compilation benchmark with settings of Time To Compile. 12 x 64 GB MRDIMM-8800MT was the fastest.

The MRDIMM modules hadn't helped in the timed code compilation benchmarks. At least in these cases we see the server power consumption between the MRDIMM-8800 and DDR5-6400 modules being quite similar with the overall server power consumption numbers.

👁 ClickHouse benchmark with settings of 100M Rows Hits Dataset, First Run / Cold Cache. 12 x 64 GB DDR5-6400MT was the fastest.

👁 ClickHouse benchmark with settings of 100M Rows Hits Dataset, Second Run. 12 x 64 GB DDR5-6400MT was the fastest.

ClickHouse had slightly favored the DDR5-6400 memory.

👁 TensorFlow benchmark with settings of Device: CPU, Batch Size: 64, Model: ResNet-50. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 TensorFlow benchmark with settings of Device: CPU, Batch Size: 256, Model: ResNet-50. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 TensorFlow benchmark with settings of Device: CPU, Batch Size: 512, Model: ResNet-50. 12 x 64 GB MRDIMM-8800MT was the fastest.

TensorFlow also saw some benefits of the MRDIMM-8800 modules installed on this Giga Computing 2U Xeon 6 Granite Rapids server.

👁 OpenVINO benchmark with settings of Model: Person Detection FP16, Device: CPU. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 OpenVINO benchmark with settings of Model: Machine Translation EN To DE FP16, Device: CPU. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 OpenVINO benchmark with settings of Model: Noise Suppression Poconet-Like FP16, Device: CPU. 12 x 64 GB MRDIMM-8800MT was the fastest.

AI is one of the areas where the MRDIMM modules can be beneficial and enhancing the overall performance of the Intel Xeon 6 Granite Rapids platforms.

👁 LocalScore benchmark with settings of Model: Meta-Llama-3.1-8B-Instruct-Q4_K_M.gguf, Acceleration: CPU. 12 x 64 GB MRDIMM-8800MT was the fastest.

With large language models is where the MRDIMM-8800 modules can prove valuable and worth the +$100 premium per DIMM over DDR5-6400 memory. With Llama.cpp LocalScore and using Meta's Llama 3.1 8B Instruct model, the server power consumption was up by around 70 Watts when replacing the twelve DDR5-6400 modules with MRDIMM-8800.

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URL: https://www.phoronix.com/review/ddr5-6400-mrdimm-8800/3

⇱ Revisiting DDR5-6400 vs. MRDIMM-8800 Performance With Intel Xeon 6 "Granite Rapids" - Phoronix

Revisiting DDR5-6400 vs. MRDIMM-8800 Performance With Intel Xeon 6 "Granite Rapids"