> ## Documentation Index
> Fetch the complete documentation index at: https://docs.coreweave.com/llms.txt
> Use this file to discover all available pages before exploring further.

# GB300 NVL72 Spectrum-X RoCE

> Specifications, pricing, and availability for the GB300 NVL72 Spectrum-X RoCE GPU instance

Powered by four NVIDIA GB300 Superchips, each featuring a "Blackwell Ultra" GPU with an unprecedented 279 GB of memory, these instances represent the absolute pinnacle of our high-performance computing offerings. These instances form part of a larger NVL72 rack architecture which boasts 21 TB of total GPU memory, interconnected by 5th-generation NVLink for a seamless, rack-scale memory fabric. For clustering, they are equipped with next-generation NVIDIA Spectrum-X RoCE (RDMA over Converged Ethernet), leveraging BlueField-3 and ConnectX-8 SuperNICs for large scale AI in Ethernet-based cloud environments.

## Specifications

| Feature              | Detail                            |
| :------------------- | :-------------------------------- |
| **Category**         | State-of-the-Art Compute          |
| **Instance ID**      | `gb300-4x-e`                      |
| **GPU**              | 4x NVIDIA GB300                   |
| **GPU RAM**          | 279 GB                            |
| **GPU Connectivity** | Spectrum-X RoCE & NVLink          |
| **CPU Model**        | 2x NVIDIA Grace Arm v9 (3.10 GHz) |
| **vCPUs**            | 144                               |
| **RAM**              | 960 GB                            |
| **Local Storage**    | 61.44 TB                          |
| **Network Speed**    | Dual-port 200GbE                  |
| **Availability**     | Contact sales for availability    |

## Primary use cases

Training next-generation foundation models in the trillion-parameter class, massive-scale and high-fidelity inference on the most complex AI models, and scientific simulations requiring maximum memory capacity and the fastest data throughput.

## Recommended models

Next-generation frontier models (multi-trillion parameters), state-of-the-art multimodal systems, and large-scale scientific discovery models.