Why it matters

GH200 pioneered coherent CPU-GPU memory. Learn for GB200 context.

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The architecture

Grace: 72 Arm Neoverse V2.

Hopper GPU: same as H100.

NVLink-C2C: 900 GB/s.

GH200 superchipGrace CPU72 Arm coresNVLink-C2C900 GB/sH100 GPUcoherent memoryCoherent CPU + GPU memory simplifies large-model programming
GH200.
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How it works end to end

480GB LPDDR5X on Grace.

96GB HBM3 on Hopper.

Coherent memory = larger effective GPU memory.