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X AI 2048 H100 CX-7 Hyperscaler Infiniband Cluster Configuration
XAI-H100-IB-8R-2L
X AI · H100 · CX-7
Rack type
NVL8
Cluster / location
Default H100 Cluster
Buyer profile
Hyperscaler
Networking type
Infiniband
Number of XPUs
2,048
NIC used
CX-7
NICs / XPU
1
Scale-out BW / XPU
400G
XPU / server
8
Scale-up network
1 rows
Assigned blockDefault
H100 - NVL8
Scale-UpXPU: H100 NVL81 lineshared by 17 SKUs
Scale-up Units are based on the scale-up world size (8 XPUs).
XPU World Size
2
WS| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| XPUs per Node | · | 8 | 3,600 | · | · |
| Scale-Up World Size | · | 8 | 28,800 | · | · |
Switches
5
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| Scale-Up Switch A | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 8,000 | 20 | 400 |
| Scale-Up Switch B | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 6,400 | 16 | 400 |
| Scale-Up Switch C | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 6,400 | 16 | 400 |
| Scale-Up Switch D | Nvidia NVSwitch 3.0 (NVLink 4) | 1 | 8,000 | 20 | 400 |
| Scale-Up Switch Total | Nvidia NVSwitch 3.0 (NVLink 4) | 4 | 28,800 | 72 | · |
Scale-Up Parts Summary
1
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Nvidia NVSwitch 3.0 (NVLink 4) | 1,024 | 4.00 | 0.50 |
Backend network
5 rows
Assigned blockDefault
H100 - NVL8 - CX7 - 2L - IB - QM9700 - Generic
BackendXPU: H100 NVL85 linesshared by 3 SKUs
Backend Units are based on the cluster size (2,048 XPUs).
Switches
4
SW Network Layer | Switch and Server Spec | Aggregate Port Utilization | Network Bandwidth Aggregate | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SwitchPart Name / Model | Units# | Unit BWGbit/s | Port BWGbit/s | Downlink Ports / SW# | Uplink Ports / SW# | Max Ports# | Downlink Ports# | Uplink Ports# | Total Ports# | Downlink BWTbit/s | Uplink BWTbit/s | OversubRatio | |
| XPUs | · | 2,048 | 400 | 400 | 0 | 2,048 | 2,048 | 0 | 2,048 | 2,048 | 0 | 819.2 | · |
| NICs per Node | ConnectX-7 NIC - 400G | 8 | 400 | 400 | · | · | 8 | · | · | · | · | · | · |
| Leaf | Quantum-2 InfiniBand (QM9700) | 64 | 25,600 | 800 | 16 | 16 | 32 | 1,024 | 1,024 | 2,048 | 819.2 | 819.2 | 1 |
| Spine | Quantum-2 InfiniBand (QM9700) | 32 | 25,600 | 800 | 32 | 0 | 32 | 1,024 | 0 | 1,024 | 819.2 | 0 | · |
Transceivers
6
CN Network Layer | Transceiver / CablePart Name / Model | Total Units# | Units per SW/GPU# | Unit BWGbit/s | Lanes# | BW per LaneGbit/s | Agg. BWTbit/s |
|---|---|---|---|---|---|---|---|
| XPU Nodes | Nvidia LinkX 400G SR4 | 2,048 | 2,048 | 400 | 8 | 50 | 819.2 |
| Leaf | |||||||
| Downlink | Nvidia LinkX 800G SR8 | 1,024 | 16 | 800 | 8 | 100 | 819.2 |
| Uplink | Nvidia LinkX 800G SR8 | 1,024 | 16 | 800 | 8 | 100 | 819.2 |
| Spine | |||||||
| Downlink | Nvidia LinkX 800G SR8 | 1,024 | 32 | 800 | 8 | 100 | 819.2 |
| Uplink | Nvidia LinkX 800G SR8 | 0 | · | · | · | · | · |
| Core | |||||||
| Downlink | · | · | · | · | · | · | · |
| Uplink | · | · | · | · | · | · | · |
| Super-Core | |||||||
Cables
6
CB Network Layer | Cable/ FiberType | Total Units# | Units per Transceiver# | Unit BWGbit/s | Lane Count# | SerDes BWGbit/s |
|---|---|---|---|---|---|---|
| XPU Nodes | Nvidia LinkX 400G Multimode | 2,048 | 1 | 400 | 4 | 100 |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Nvidia LinkX 400G Multimode | 2,048 | 2 | 400 | 4 | 100 |
| Spine | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Core | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Super-Core | ||||||
Backend Parts Summary
5
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Nvidia LinkX 400G SR4 | 2,048 | 8.00 | 1.00 |
| Nvidia LinkX 400G Multimode | 4,096 | 16.00 | 2.00 |
| Nvidia LinkX 800G SR8 | 3,072 | 12.00 | 1.50 |
| ConnectX-7 NIC - 400G | 2,048 | 8.00 | 1.00 |
| Quantum-2 InfiniBand (QM9700) | 96 | 0.38 | 0.05 |
Frontend network
11 rows
Assigned blockDefault
H100 - NVL8 - SN5600 - Generic
FrontendXPU: H100 NVL811 linesshared by 10 SKUs
Converged Frontend + Storage Fabric
11
| Layer | Part / Model | Units | Attach / XPU |
|---|---|---|---|
| · | Spectrum-4 51.2T (SN5600) | 25 | 0.0120 |
| · | Spectrum-3 12.8T (SN4700) | 0 | 0.0000 |
| · | Spectrum-2 6.4T (SN3700) | 4 | 0.0018 |
| · | Spectrum-2 1GbE (SN2201) | 30 | 0.0147 |
| · | Nvidia LinkX 800G SR8 | 1,189 | 0.5807 |
| · | Nvidia LinkX 400G SR4 | 1,183 | 0.5777 |
| · | Nvidia LinkX 100G SR4 QSFP28 | 525 | 0.2563 |
| · | Nvidia LinkX 800G Multimode | 1,628 | 0.7947 |
| · | Nvidia LinkX 400G Multimode | 8 | 0.0041 |
| · | Nvidia LinkX 100G Multimode | 234 | 0.1142 |
| · | RJ45 Cables | 1,443 | 0.7048 |
Frontend Parts Summary
11
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Spectrum-4 51.2T (SN5600) | 787 | 3 | 0.3841 |
| Spectrum-3 12.8T (SN4700) | 3 | 0 | 0.0016 |
| Spectrum-2 6.4T (SN3700) | 117 | 0 | 0.0571 |
| Spectrum-2 1GbE (SN2201) | 962 | 4 | 0.4698 |
| Nvidia LinkX 800G SR8 | 38,057 | 149 | 18.5825 |
| Nvidia LinkX 400G SR4 | 37,859 | 148 | 18.4857 |
| Nvidia LinkX 100G SR4 QSFP28 | 16,800 | 66 | 8.2032 |
| Nvidia LinkX 800G Multimode | 52,084 | 203 | 25.4317 |
| Nvidia LinkX 400G Multimode | 267 | 1 | 0.1302 |
| Nvidia LinkX 100G Multimode | 7,483 | 29 | 3.6540 |
| RJ45 Cables | 46,187 | 180 | 22.5524 |
Compute Tray Networking Content
1 rows
Networking components inside the compute tray — accelerators, board-to-board connectors, retimers, and their per-tray bandwidth.
Assigned blockDefault
H100 - NVL8 - Generic
Compute TrayXPU: H100 NVL81 lineshared by 16 SKUs
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|---|---|---|---|---|---|
| XPUs per Tray | Hopper 100 | 8 | · | · | · | · |
| H100 Server | NVLink PCIe 5.0 x16 Retimer | 8 | 512 | · | · | · |
Compute Tray Parts Summary
1
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| NVLink PCIe 5.0 x16 Retimer | 2,048 | 8.00 | 1.00 |