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 4 of 5. 12 Comments.

👁 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.

👁 Llama.cpp benchmark with settings of Backend: CPU BLAS, Model: Qwen3-8B-Q8_0, Test: Text Generation 128. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Llama.cpp benchmark with settings of Backend: CPU BLAS, Model: gpt-oss-20b-Q8_0, Test: Text Generation 128. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Llama.cpp benchmark with settings of Backend: CPU BLAS, Model: Llama-3.1-Tulu-3-8B-Q8_0, Test: Text Generation 128. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Llama.cpp benchmark with settings of Backend: CPU BLAS, Model: Mistral-7B-Instruct-v0.3-Q8_0, Test: Text Generation 128. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Llama.cpp benchmark with settings of Backend: CPU BLAS, Model: granite-3.0-3b-a800m-instruct-Q8_0, Test: Prompt Processing 512. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Llama.cpp benchmark with settings of Backend: CPU BLAS, Model: granite-3.0-3b-a800m-instruct-Q8_0, Test: Prompt Processing 1024. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 OpenVINO GenAI benchmark with settings of Model: TinyLlama-1.1B-Chat-v1.0, Device: CPU. 12 x 64 GB MRDIMM-8800MT was the fastest.

For LLM/GenAI workloads the DDR5-8800 memory was proving beneficial and helping the Intel Xeon 6980P deliver higher performance albeit with increased power consumption and the current pricing premium over DDR5-6400 server memory modules.

👁 Memcached benchmark with settings of Set To Get Ratio: 1:100. 12 x 64 GB MRDIMM-8800MT was the fastest.

👁 Pogocache benchmark with settings of Set To Get Ratio: 1:100. 12 x 64 GB MRDIMM-8800MT was the fastest.

The MRDIMM-8800 modules also helped deliver greater performance in fast caching / memory database applications like Memcached and Pogocache.

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URL: https://www.phoronix.com/review/ddr5-6400-mrdimm-8800/4

⇱ 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"