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The NVIDIA GB200 Grace Blackwell Superchip combines one Grace CPU and two Blackwell GPUs in a single computing component. It connects them with NVLink-C2C, which NVIDIA specifies at 900 GB/s of bidirectional bandwidth and describes as providing coherent access to a unified memory space. The GB200 NVL72, by contrast, is a full rack-scale system built from many such components—not another name for one superchip.
What does “Grace Blackwell Superchip” mean?
“Grace Blackwell Superchip” refers to NVIDIA’s GB200 CPU-and-GPU component: one NVIDIA Grace CPU connected to two NVIDIA Blackwell Tensor Core GPUs. NVIDIA describes it as a key component of its GB200 NVL72 system. The name therefore identifies the combined processor configuration, not the entire rack.
The design brings a CPU and GPUs together as a tightly connected computing unit. The CPU and GPUs remain distinct processors, but the high-bandwidth connection is intended to let them exchange data and access memory coherently. NVIDIA’s GB200 NVL Multi-Node Tuning Guide describes the superchip and its NVLink-C2C connection.
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How is the GB200 different from the GB200 NVL72?
The key distinction is scale: GB200 names the one-CPU, two-GPU superchip configuration, while GB200 NVL72 names a rack-scale system containing 36 Grace CPUs and 72 Blackwell GPUs. Those are totals for the system, not the contents of one superchip. NVIDIA’s GB200 NVL72 product page and DGX GB Rack Scale Systems User Guide describe the larger system.
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| Name | What it refers to | CPU and GPU count |
|---|---|---|
| GB200 Grace Blackwell Superchip | One CPU-and-GPU computing component | 1 Grace CPU and 2 Blackwell GPUs |
| GB200 NVL72 | Liquid-cooled rack-scale system | 36 Grace CPUs and 72 Blackwell GPUs |
How do the CPU and GPUs communicate?
NVLink-C2C connects the Grace CPU to the two Blackwell GPUs. NVIDIA specifies its bandwidth as 900 GB/s bidirectional and says it enables coherent access to a unified memory space. In practical terms, the architecture is designed to allow the processors to share data through a high-bandwidth, memory-coherent connection rather than treating them as unrelated devices.
This interconnect figure describes NVLink-C2C within the superchip. It is distinct from the separate NVLink bandwidth figure NVIDIA lists for the GB200 product configuration. The numbers refer to different connections and should not be read as interchangeable.
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- [Double-Flow-Through Design] The RTX PRO 6000 Blackwell features a double-flow-through cooling design, optimizing efficiency and airflow to sustain peak performance under 600W power loads. | [5th Gen Tensor Cores] Deliver up to 3X the performance of the previous generation and support for FP4 precision for faster AI model processing times with reduced memory usage, enabling local fine-tuning of LLMs and generative AI | [4th Gen Ray Tracing Cores] Double the ray-triangle intersection rate of the previous generation to create photoreal, physically accurate scenes and immersive 3D designs with RTX Mega Geometry, which enables up to 100X more ray-traced triangles.
- [PCIe Gen 5] Support for PCIe Gen 5 provides double the bandwidth of PCIe Gen 4, improving data-transfer speeds from CPU memory and unlocking faster performance for data-intensive tasks like AI, data science, and 3D modeling. | [GDDR7 Memory] With 96 GB of GPU memory and 1.8 TB ps bandwidth, it can tackle massive 3D and AI projects, fine-tune AI models locally, explore large-scale VR environments, and drive larger multi-app workflows.
- [DisplayPort 2.1] Achieve unparalleled visual clarity and performance, driving high resolution displays at up to 8K at 240 Hz and 16K at 60 Hz. Increased bandwidth enables seamless multi-monitor setups while HDR and higher color depth support ensures superior color accuracy for precision work, such as video editing, 3D design, and live broadcasting.
- [Universal MIG] Divide a single RTX PRO 6000 Blackwell into multiple isolated instances, each with dedicated resources, allowing for concurrent execution of multiple workloads, optimized GPU utilization, and secure isolation of different applications or users. [WARRANTY] 3 YR Manufacturer's Warranty. Bulk OEM Packaging. Retail Packaging is NOT included.
What specifications does NVIDIA list for GB200?
NVIDIA’s GB200 NVL72 product page, accessed October 7, 2026, lists the following figures for the GB200 Grace Blackwell Superchip configuration. They are NVIDIA’s published specifications, not independent benchmark results.
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| Specification | NVIDIA-listed figure | What it describes |
|---|---|---|
| NVFP4 Tensor Core performance | 20 PFLOPS | Tensor Core performance at NVFP4 precision |
| HBM3E GPU memory | 372 GB | GPU memory |
| GPU memory bandwidth | 16 TB/s | Bandwidth of the GPU memory |
| NVLink bandwidth | 3.6 TB/s | NVLink, separate from the NVLink-C2C link |
| NVLink-C2C bandwidth | 900 GB/s bidirectional | Connection between the Grace CPU and Blackwell GPUs; listed in NVIDIA’s tuning guide |
The first four figures are from NVIDIA’s GB200 NVL72 product page; the NVLink-C2C figure is from its GB200 NVL Multi-Node Tuning Guide. The product page notes that projected performance is subject to change.
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What is the Blackwell architecture designed to do?
Blackwell includes a second-generation Transformer Engine and FP4 support. NVIDIA says the Transformer Engine combines Blackwell Tensor Core technology with software innovations to accelerate large language model and mixture-of-experts training and inference. That describes the platform’s intended capabilities; it does not guarantee a particular application’s speed or performance.
Likewise, NVIDIA’s comparisons for NVL72 training and inference depend on stated workload and system assumptions. Treat them as vendor claims tied to those conditions, not as universal or independently verified results. NVIDIA’s GB200 NVL72 announcement provides context for its stated use cases.
Quick Recap
What should you remember?
- GB200 is one Grace CPU paired with two Blackwell GPUs.
- NVLink-C2C is the high-bandwidth, coherent connection within that component; NVIDIA specifies it at 900 GB/s bidirectional.
- GB200 NVL72 is the much larger rack-scale system, with 36 Grace CPUs and 72 Blackwell GPUs.
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