The NVIDIA GB200 Grace Blackwell Superchip is one Grace CPU connected to two Blackwell Tensor Core GPUs. It is a component, not the entire GB200 NVL72 rack. NVIDIA describes the connection as a high-bandwidth, memory-coherent link that lets the processors access a unified memory space.
What the Grace Blackwell Superchip contains
GB200 combines processors built for different roles: a Grace CPU and two Blackwell GPUs. NVIDIA identifies NVLink-C2C as the interconnect joining them. This makes GB200 a heterogeneous CPU-GPU computing component rather than a single conventional processor.
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NVIDIA specifies 900 GB/s of bidirectional bandwidth for NVLink-C2C and describes the connection as providing coherent access to a unified memory space. In practical terms, the design is intended to let the CPU and GPUs exchange data while working within a coherent memory environment. That architectural description does not by itself guarantee a particular application’s speed.
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See NVIDIA’s GB200 NVL Multi-Node Tuning Guide for its component and interconnect description, and its GB200 NVL72 architecture overview for the unified-memory explanation.
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- AI Performance: 767 AI TOPS
- OC mode: 2632 MHz (OC mode)/ 2602 MHz (Default mode)
- Powered by the NVIDIA Blackwell architecture and DLSS 4
- Axial-tech fan design features a smaller fan hub that facilitates longer blades and a barrier ring that increases downward air pressure
- A 2.5-slot design maximizes compatibility and cooling efficiency for superior performance in small chassis
GB200 superchip versus GB200 NVL72
The names refer to different scales of hardware. A GB200 superchip is the CPU-and-GPU unit; GB200 NVL72 is a liquid-cooled, rack-scale system built from many such components and linked with NVLink.
| Configuration | Grace CPUs | Blackwell GPUs | What the name means |
|---|---|---|---|
| GB200 Grace Blackwell Superchip | 1 | 2 | One CPU-GPU component |
| GB200 NVL72 system | 36 | 72 | A rack-scale system |
NVIDIA lists the system-level counts on its GB200 NVL72 product page; its DGX GB Rack Scale Systems User Guide covers the rack-scale systems. The “72” in NVL72 refers to the system’s 72 GPUs, not the number of GPUs in one superchip.
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- Powered by the NVIDIA Blackwell architecture and DLSS 4
- Powered by GeForce RTX 5070 Ti
- Integrated with 16GB GDDR7 256bit memory interface
- PCIe 5.0
- WINDFORCE cooling system
What NVIDIA’s specifications describe
NVIDIA’s current GB200 NVL72 product page, accessed October 7, 2026, lists the following figures for the GB200 Grace Blackwell Superchip. The page does not state a publication year, and it notes that projected performance is subject to change.
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| Specification | NVIDIA-listed value |
|---|---|
| NVFP4 Tensor Core performance | 20 PFLOPS |
| HBM3E GPU memory | 372 GB |
| GPU memory bandwidth | 16 TB/s |
| NVLink bandwidth | 3.6 TB/s |
| NVLink-C2C bandwidth | 900 GB/s bidirectional |
These are NVIDIA’s published specifications, not independent benchmark results. The company’s product page provides workload and system assumptions for its NVL72 training and inference comparisons; results depend on those conditions and should not be treated as a universal application-speed guarantee.
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- Powered by the NVIDIA Blackwell architecture and DLSS 4. System Requirements: Minimum 850W PSU with 16-pin 12V-2x6 (12VHPWR) connector required. Verify before purchasing.
- Military-grade components deliver rock-solid power and longer lifespan for ultimate durability. Compatibility: 348mm (13.7") length, 3.6 slots, 4.3 lbs. Confirm case clearance and slot spacing. GPU bracket included.
- Protective PCB coating helps protect against short circuits caused by moisture, dust, or debris
- 3.6-slot design with massive fin array optimized for airflow from three Axial-tech fans
- Phase-change GPU thermal pad helps ensure optimal thermal performance and longevity, outlasting traditional thermal paste for graphics cards under heavy loads
Why Blackwell’s architecture matters
Blackwell adds a second-generation Transformer Engine and FP4 support. NVIDIA says the engine combines Blackwell Tensor Core technology with software innovations to accelerate large language model and mixture-of-experts training and inference. Those are intended capabilities; actual performance depends on the workload, software, system configuration, and measurement conditions.
Quick Recap
Best Value
- Powered by the NVIDIA Blackwell architecture and DLSS 4 OC mode: 2640MHz/Default mode: 2610MHz (Boost Clock)
- Military-grade components deliver rock-solid power and longer lifespan for ultimate durability
- Protective PCB coating helps protect against short circuits caused by moisture, dust, or debris
- 3.125-slot design with massive fin array optimized for airflow from three Axial-tech fans
- Phase-change GPU thermal pad helps ensure optimal thermal performance and longevity, outlasting traditional thermal paste for graphics cards under heavy loads
Rank #4
- Powered by the NVIDIA Blackwell architecture and DLSS 4
- Powered by GeForce RTX 5060
- Integrated with 8GB GDDR7 128bit memory interface
- PCIe 5.0
- WINDFORCE cooling system
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