What is the switching capacity of HPE Slingshot R4K41B?

The R4K41B provides 25.6 Tbps bi-directional bandwidth with 64 QSFP-DD ports at 200 Gbps each. This non-blocking architecture ensures wire-speed performance across all ports, ideal for HPC clusters demanding sustained high throughput without packet loss.

What form factor and port configuration does it use?

1U rack-mountable chassis with 64 QSFP-DD ports supporting 200 Gigabit Ethernet over optical fiber. Modular expansion slots enable flexible deployment in dense datacenter racks for spine or leaf roles.

Is it suitable for AI and HPC workloads?

Yes, optimized for AI/ML training and HPC simulations with low-latency Ethernet, RDMA over Converged Ethernet (RoCE), and hardware acceleration for MPI/SHMEM. Delivers consistent scale-out performance for GPU-accelerated clusters.

What media types are supported?

Primarily optical fiber via QSFP-DD transceivers for 200G links. Designed for high-reliability datacenter interconnects with support for multi-mode and single-mode fiber optics.

How does it integrate with Ethernet networks?

Combines HPC-specific fabrics with standard Ethernet protocols, enabling converged infrastructure. Supports native IP applications alongside HPC codes, reducing need for separate networks in hybrid environments.

What are key performance advantages?

Ultra-low latency under full load, high radix for fat-tree topologies, and no overprovisioning required. Built on Cray silicon for predictable bandwidth in scale-up/scale-out deployments up to thousands of nodes.

R4K41B - HPE R4K41B Slingshot 64x200G QSFP-DD 25.6Tbps 1U Switch

Name: HPE R4K41B Slingshot 64x200G QSFP-DD 25.6Tbps 1U Switch
Brand: HPE
SKU: R4K41B

R4K41B - HPE R4K41B Slingshot 64x200G QSFP-DD 25.6Tbps 1U Switch | US IT Hardware

Product overview

The HPE Slingshot R4K41B is a high-performance 1U switch designed for modern HPC and AI data center environments. Featuring 64 QSFP-DD ports each supporting 200 Gbps Ethernet, it provides 25.6 Tbps of bi-directional switching bandwidth with ultra-low latency. Built on specialized Cray silicon, it combines HPC-optimized fabrics with standard Ethernet for converged infrastructure, enabling efficient scaling of simulation, ML training, and analytics workloads. Key benefits include consistent performance under full load, no overprovisioning needed, and support for RDMA, MPI, and SHMEM acceleration. Ideal for large-scale clusters handling east-west traffic with high radix connectivity. Modular design supports optical fiber media for reliable, high-speed links in rack-dense deployments.

64 QSFP-DD ports at 200 Gbps each.
25.6 Tbps bi-directional switching bandwidth.
1U rack-mountable form factor.
Low-latency HPC-optimized Ethernet fabric.
Supports RDMA, MPI, and SHMEM acceleration.
Optical fiber media for reliable 200G links.

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	R4K41B
Brand	HPE
Condition	New
Model	R4K41B
Modular	Yes
Acceleration	RDMA, MPI, SHMEM
Product Line	Slingshot
Product Type	Networking Switch
Target Market	HPC/AI Data Centers
Interconnect Type	Ethernet-based HPC fabric
Ethernet Technology	200 Gigabit Ethernet

Compatible systems

Optimized for HPE Cray supercomputers and GPU servers; requires matching Slingshot NICs and QSFP-DD optics.

HPE Cray
Model: EX Series
Form factor: Rack
Generation: Shasta
Native integration for supercomputing clusters.
HPE Apollo
Model: 6500 Gen10
Form factor: GPU Server
Generation: Gen10
Potential for AI clusters with Slingshot NICs.

Best for

HPC Simulation
High-bandwidth, low-latency interconnect for large-scale scientific computing and modeling workloads.
AI/ML Training
Supports massive parallel GPU clusters with RDMA and 200G Ethernet for accelerated deep learning.
Data Analytics
Efficient scaling for analytics pipelines accessing shared data sources without congestion.
Cloud HPC
Converged Ethernet fabric for multi-tenant HPC environments with native IP compatibility.
Spine/Leaf Fabric
High-radix spine switch in datacenter topologies for east-west traffic dominance.

Details

Shipping, warranty & returns

Customer reviews

No reviews yet — be the first to review this part.

Bandwidth	High-bandwidth low-latency
Switching Capacity	25.6 Tbps bi-directional

Media Type	Optical Fiber
Form Factor	1U Rack-Mountable
Chassis Type	Fixed

Ports	64 x QSFP-DD
Management	Out-of-band 1/10 Gbps
Port Speed	200 Gigabit Ethernet

HPE R4K41B Slingshot 64x200G QSFP-DD 25.6Tbps 1U Switch

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Network & Communication

Physical Characteristics

Interface/Ports

Frequently asked questions