RocketStor 8631C
PCIe Gen5 x16 eGPU Expansion Chassis
Key Features:
Dedicated x16 lanes of host-to-device PCIe Gen5 bandwidth
PCI-SIG CopprLink Compliant
Universal GPU Compatibility: Supports industry standard full-height, 2-slot and 3-slot NVIDIA, AMD, Intel, etc. GPUs
Delivers up to 600W of dedicated Power to hosted GPUs
Seamless, Plug-and-Play Software-less Installation for Linux & Windows Platforms



Key Features:
Unrestricted Performance: Industry Leading PCIe Switching technology guarantees x16 lanes of dedicated Gen5 bandwidth
Universal GPU Compatibility: Support industry standard full-height, 2-slot, and 3-slot GPUs from all leading manufacturers.
Directly Provides up to 850W of power for high-end GPUs
Robust, Enterprise Grade External PCIe x16 CDFP Gen5 connectivity
Low-profile host interface adapter is Ideal for CopprLink-CDFP Connectivity
Advanced Dual-Fan Cooling System with Programmable Smart Fan Control prevents thermal throttling
Seamless, Plug-and-Play Software-less Installation for Linux & Windows Platforms
Industry Leading PCIe Switching Architecture
RocketStor 8631C is powered by HighPoint’s revolutionary PCIe Gen5 Switching Architecture, which leverages Broadcom’s industry-leading PEX89048 IC to optimize signal integrity, minimize latency, and maximize data transfer speed.This solution provides 48 lanes of internal PCIe Gen5 bandwidth; 16 lanes to the upstream connection for both the host platform and GPU; achieves a maximum data transfer rate of 64GB/s; and minimizes latency through optimized design and components.

Superior Performance and Universal GPU Compatibility
Leveraging industry-leading PCIe switching technology, the RocketStor 8631C ensures x16 host-to-device bandwidth, delivering unrestricted performance for demanding workloads, superior performance than conventional Thunderbolt or OCuLink solutions.
The RocketStor 8631C supports a wide range of full-height, 2-slot, and 3-slot GPUs from leading manufacturers like NVIDIA, AMD, and Intel, making it a versatile choice for diverse computing needs.
Advanced Cooling System
To maintain optimal performance, the RocketStor 8631C features a robust dual-fan cooling system with programmable smart fan control. This system effectively dissipates heat, preventing thermal throttling and ensuring that your system runs at peak performance even under heavy loads.
Pro-Active Hardware Monitoring System
The RocketStor 8631C includes automated smart modes and manual operation flexibility, paired with an intuitive user interface that tracks and logs the status of the GPU, enclosure, and hostAdapter hardware in real time. Additionally, the product is equipped with hardware monitoring capabilities, including GPU operating status, electrical characteristics, fan control features, GPU/enclosure temperature, and PCIe connection status, providing comprehensive insights into system health and performance.
Elegant & Robust: CopprLink Connectivity & Power Delivery
Equipped with external CopprLink cables, the RocketStor 8631C offers enterprise-grade reliability and low-latency connectivity, ensuring seamless and high-performance data transfer for demanding workloads.
The chassis provides up to 850W of direct power, ensuring that even the most power-hungry GPUs operate at peak performance.
The enclosure’s strict adherence to the PCI-SIG CopprLink specification ensure the physical connector, pin layout, and signal requirements are fully compliant with external Gen5 x16 connectivity:
Guaranteed Interoperability: RocketStor 8631x Enclosures are guaranteed to connect and communicate seamlessly with PCI-SIG CopprLink compliant adapters, such as the Rocket 7634D and Rocket 7638D.
Future-Proof Reliability: The CopprLink specification is designed to manage the complexities of Gen5's 32GT/s signaling speed and paves the way forward for Gen6 solutions; it provides a verified link between the external GPU and accelerator devices and the host platform, reducing engineering risk and improving system uptime.
Learn More about HighPoint's External CopprLink Architecture
Direct Power Delivery
The RocketStor 8631C provides up to 600W directly to the hosted GPU; ideal for a wide range of high-end Gen5 Gaming and mid-range entperprise GPU.
Available as Turnkey Expansion Kits or External Enclosure Accessories
RocketStor 8600 series external expansion solutions are avaiable as complete turnkey expansion kits, consisting of the enclosure hardware, cabling & CDFP/CopprLink adapter, or as stand-alone external enclosures.
Target Audience & Applications: AI Infrastructure Architects, HPC System Builders, Gen Platform Integrators, Enterprise IT
This family represents the pinnacle of external PCIe fabric technology. Designed for Gen5 host platforms, these enclosures deliver the fastest data transfer speeds and TDP support for next-generation accelerators.
Model | PCle Generation | TDP Power Support | Primary Use Case | Buy Now |
|---|---|---|---|---|
RocketStor 8631D | Gen5 x16 | 1300W PSU | Designed for professional/enterprise applications that demand maximum TDP for today's high-end GPUs, FGPAs, and I/O Accelerators | Buy Now |
RocketStor 8631C | Gen5 x16 | 600W PSU | High-speed external PCle Gen5 expansion for mid-range GPUs and NICs. | Buy Now |
RocketStor 8531AW | Gen4 x16 | 600W PSU | Full-Kit version of the RocketStor 8531A (includes external PCle CDFP adapter card) | Buy Now |
RocketStor 8000 series HighPoint eGPU enclosure RS8000 RocketStor 8631CW RS8631CW

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