800G InfiniBand fabric switch, Quantum-X800 class, 144 ports
NVIDIA Quantum-X800 class InfiniBand switch with 144 ports at 800 Gb/s XDR in 4U, 115 Tb/s of switching and SHARP, for HGX B300 and GB300 NVL72 fabrics.
- Ports
- 144 x 800 Gb/s XDR InfiniBand through 72 OSFP cages, splittable to 288 x 400 Gb/s
- Throughput
- 115.2 Tb/s aggregate switching
- In network computing
- SHARP fourth generation, adaptive routing, congestion control
- Form factor
- 4U, air cooled, 8 hot swap PSUs; 2U 72 port class also available
- Management
- Subnet manager, UFM fabric management, telemetry
- Use
- Leaf and spine for 64 to 2,000 GPU clusters on HGX B300, B200 and GB300 NVL72
Overview
The Quantum-X800 class switch is the InfiniBand fabric for Blackwell Ultra clusters. With 144 ports at 800 Gb/s in four rack units and 115.2 Tb/s of switching, a single switch connects 64 HGX B300 GPUs at full rate with ports to spare for a spine, and a two tier design built from these switches scales to thousands of GPUs without blocking.
InfiniBand remains the first choice for training because of its in network computing: fourth generation SHARP offloads all reduce and other collectives into the switch, and adaptive routing with congestion control keeps large jobs from stalling on hot links. It pairs with the ConnectX-8 SuperNICs integrated on the HGX B300 baseboard and with GB300 NVL72 scale out ports.
We quote the switch with the fabric design, OSFP optics and cables, the subnet manager and fabric management software, and a support contract. The 2U 72 port class is available for pods that do not need the full 144 ports. Ask for the fabric design service when you order a cluster, and the port map comes with the rack elevation.
Use cases
- GPU training fabrics
- HGX B300 and B200 pods
- GB300 NVL72 scale out
- HPC interconnect
Specifications
| Speed | 800 Gb/s XDR per port, backward compatible with NDR 400 Gb/s and HDR 200 Gb/s |
|---|---|
| Count | 144 ports through 72 OSFP cages (4U class), or 72 ports through 36 OSFP cages (2U class) |
| Optics | 800G OSFP transceivers, active copper and optical cables |
| Switching capacity | 115.2 Tb/s (4U class), 57.6 Tb/s (2U class) |
|---|---|
| In network computing | SHARP fourth generation for collective offload |
| Routing | Adaptive routing, congestion control, self healing fabric |
| Form factor | 4U (144 port) or 2U (72 port), air cooled, front to back or back to front airflow |
|---|---|
| Power supplies | 8 hot swap PSUs (4U class), 4 hot swap PSUs (2U class) |
| Planning power | Depends on optics population; allow for a 4U class switch fully populated in the rack power schedule |
Figures describe the system class. Exact configuration, weights and power draw are confirmed on the quotation.
What's included
- Rails, power cords and airflow kit matched to your rack
- Operating system license and subscription as quoted
- Port map and cabling plan when ordered with servers
- Burn in and port test report
- Manufacturer support contract, 3 to 5 years
Compliance
This product is not a data center GPU system and does not require NVIDIA end user registration. Standard export documentation applies. Read about export compliance.
Related
Related systems
800G Spectrum-X Ethernet switch
- Ports
- 64 x 800 GbE OSFP
- Throughput
- 51.2 Tb/s aggregate switching
- AI features
- Spectrum-X RoCE with adaptive routing
- Form factor
- 2U, air cooled
ConnectX-8 SuperNIC, 800 Gb/s
- Speed
- 800 Gb/s, InfiniBand XDR or 800 GbE
- Host interface
- PCIe Gen6 x16
- Offloads
- RDMA, GPUDirect RDMA
- Form factor
- PCIe card with short or tall bracket
800G OSFP transceivers and cables
- Transceivers
- 800G OSFP, twin port 2 x 400G
- Copper
- 800G OSFP active and passive copper cables for in rack and adjacent rack links
- Optical
- 800G active optical cables and breakout cables to 2 x 400G
- Fiber
- MPO and LC patch cords
8 node HGX B300 AI pod, 64 GPUs
Allocation required- GPU nodes
- 8 x 8 GPU HGX B300 servers, 64 x B300
- Fabric
- 64 x 800 Gb/s ports, non blocking
- CPU and control
- 2 x CPU nodes for data services
- Chassis
- Multi rack, about 125 kW, air cooled
Compare it with the next class up or down
The nearest classes we quote are the 800G Spectrum-X Ethernet switch and the ConnectX-8 SuperNIC, 800 Gb/s. If neither is quite right, tell us the workload and we specify the system between them.
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