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X AI 36864 VR200 CX-9 Hyperscaler Ethernet Cluster Configuration
XAI-VR200-CX9-SX6-Eth-3L
X AI · VR200 · CX-9
Rack type
NVL72
Cluster / location
Default VR200
Buyer profile
Hyperscaler
Networking type
Ethernet
Number of XPUs
36,864
NIC used
CX-9
NICs / XPU
2
Scale-out BW / XPU
1.6T
XPU / server
72
Scale-up network
7 rows
Assigned blockDefault
VR200 - NVL72
Scale-UpXPU: VR200 NVL727 linesshared by 31 SKUs
Scale-up Units are based on the scale-up world size (72 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 | · | 4 | 14,400 | 36 | 400 |
| Scale-Up World Size | · | 72 | 1,036,800 | · | · |
Switches
2
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| per Switch | Nvidia NVSwitch 6.0 (NVLink 6) | 1 | 28,800 | 72 | 400 |
| Scale-Up Switch Total | · | 36 | 1,036,800 | · | · |
Connections & cabling
7
CN| Scale-Up Network Layer | Part / Model | Units# | BW / PortGbit/s uni-d | Unit Bidi# | Bidi / Port# | Total Bidi# | BW / Connector | Cable / Model | Cable Units# |
|---|---|---|---|---|---|---|---|---|---|
| Male Connectors | NV Paladin HD2 224Gb/s 144 Bidi (Male) | 36 | 400 | 144 | 2 | 5,184 | 28,800 | Already Counted Below | · |
| Female Connectors | NV Paladin HD2 224Gb/s 144 Bidi (Female) | 36 | 400 | 144 | 2 | 5,184 | 28,800 | Already Counted Below | · |
| Switch Total | ** One connector per switch | · | · | · | · | · | 28,800 | · | · |
| Male Connectors | NV Paladin HD2 224Gb/s 72 Bidi (Male) | 72 | 400 | 72 | 2 | 5,184 | 14,400 | Already Counted Below | · |
| Female Connectors | NV Paladin HD2 224Gb/s 72 Bidi (Female) | 72 | 400 | 72 | 2 | 5,184 | 14,400 | NV 224Gb/s SkewClear EXD Gen 2 Bidi Cable | 5,184 |
| XPU Total | ** One connector per GPU | · | · | · | · | · | 14,400 | · | · |
| · | NVL Spine Chassis (NvLink 6) | 2 | · | · | · | · | · | · | · |
Notes
- per Switch · Nvidia NVSwitch 6.0 (NVLink 6) — >> 9 switch trays, 4 NVSwitch 6.0 per tray
Scale-Up Parts Summary
7
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Nvidia NVSwitch 6.0 (NVLink 6) | 18,432 | 36.00 | 0.50 |
| NV Paladin HD2 224Gb/s 144 Bidi (Male) | 18,432 | 36.00 | 0.50 |
| NV Paladin HD2 224Gb/s 144 Bidi (Female) | 18,432 | 36.00 | 0.50 |
| NV Paladin HD2 224Gb/s 72 Bidi (Male) | 36,864 | 72.00 | 1.00 |
| NV Paladin HD2 224Gb/s 72 Bidi (Female) | 2,654,208 | 5,184.00 | 72.00 |
| NV 224Gb/s SkewClear EXD Gen 2 Bidi Cable | 2,654,208 | 5,184.00 | 72.00 |
| NVL Spine Chassis (NvLink 6) | 1,024 | 2.00 | 0.03 |
Backend network
5 rows
Assigned blockDefault
VR200 - NVL72 - CX9 - 3L - ETH - SN6600 - XAI
BackendXPU: VR200 NVL725 linesshared by 1 SKU
Backend Units are based on the cluster size (36,864 XPUs).
Switches
5
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 | · | 36,864 | 800 | 800 | 0 | 36,864 | 36,864 | 0 | 36,864 | 36,864 | 0 | 29,491.2 | · |
| NICs per Node | ConnectX-9 NIC - 800G | 8 | 800 | 800 | · | · | 4 | · | · | · | · | · | · |
| Leaf | Spectrum-6 102.4T x1600 (SN6600) | 2,048 | 102,400 | 800 | 36 | 36 | 128 | 73,728 | 73,728 | 262,144 | 58,982.4 | 58,982.4 | 1 |
| Spine | Spectrum-6 102.4T x1600 (SN6600) | 1,152 | 102,400 | 800 | 64 | 64 | 128 | 73,728 | 73,728 | 147,456 | 58,982.4 | 58,982.4 | 1 |
| Core | Spectrum-6 102.4T x1600 (SN6600) | 576 | 102,400 | 800 | 128 | · | 128 | 73,728 | 0 | 73,728 | 58,982.4 | 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 | None - AECs are Used -> | 73,728 | 73,728 | 1,600 | 4 | 400 | 117,964.8 |
| Leaf | |||||||
| Downlink | None - AECs are Used -> | 36,864 | 18 | 1,600 | 8 | 200 | 58,982.4 |
| Uplink | None - AECs are Used -> | 36,864 | 18 | 1,600 | 8 | 200 | 58,982.4 |
| Spine | |||||||
| Downlink | None - AECs are Used -> | 36,864 | 32 | 1,600 | 8 | 200 | 58,982.4 |
| Uplink | Generic 800G DR4 | 73,728 | 64 | 800 | 4 | 200 | 58,982.4 |
| Core | |||||||
| Downlink | Generic 800G DR4 | 73,728 | 128 | 800 | 4 | 200 | 58,982.4 |
| 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 | Credo 1.6T AEC - xAI | 73,728 | 1 | 1,600 | 4 | 400 |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Credo 1.6T AEC - xAI | 36,864 | 1 | 1,600 | 8 | 200 |
| Spine | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 800G DR4 Single Mode | 73,728 | 1 | 800 | 4 | 200 |
| Core | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Super-Core | ||||||
Backend Parts Summary
5
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Credo 1.6T AEC - xAI | 110,592 | 216.00 | 3.00 |
| ConnectX-9 NIC - 800G | 73,728 | 144.00 | 2.00 |
| Spectrum-6 102.4T x1600 (SN6600) | 3,776 | 7.38 | 0.10 |
| Generic 800G DR4 | 147,456 | 288.00 | 4.00 |
| Generic 800G DR4 Single Mode | 73,728 | 144.00 | 2.00 |
Frontend network
11 rows
Assigned blockDefault
VR200 - NVL72 - Cisco Silicon One - XAI - 2
FrontendXPU: VR200 NVL7211 linesshared by 1 SKU
Converged Frontend + Storage Fabric
11
| Layer | Part / Model | Units | Attach / XPU |
|---|---|---|---|
| · | Cisco Silicon One 51.2T | 443 | 0.0120 |
| · | Cisco Silicon One 12.8T | 2 | 0.0000 |
| · | Cisco Silicon One 6.4T | 66 | 0.0018 |
| · | Generic BlackBox 1GbE Ethernet | 541 | 0.0147 |
| · | Generic 1.6T DR8 (SiPho) | 21,407 | 0.5807 |
| · | Generic 800G DR4 | 21,296 | 0.5777 |
| · | Generic 200G SR4 | 9,450 | 0.2563 |
| · | Generic 800G Multimode | 29,297 | 0.7947 |
| · | Generic 400G Multimode | 150 | 0.0041 |
| · | Generic 200G Multimode | 4,209 | 0.1142 |
| · | RJ45 Cables | 25,980 | 0.7048 |
Frontend Parts Summary
11
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Cisco Silicon One 51.2T | 443 | 1 | 0.0120 |
| Cisco Silicon One 12.8T | 2 | 0 | 0.0001 |
| Cisco Silicon One 6.4T | 66 | 0 | 0.0018 |
| Generic BlackBox 1GbE Ethernet | 541 | 1 | 0.0147 |
| Generic 1.6T DR8 (SiPho) | 21,407 | 42 | 0.5807 |
| Generic 800G DR4 | 21,296 | 42 | 0.5777 |
| Generic 200G SR4 | 9,450 | 18 | 0.2563 |
| Generic 800G Multimode | 29,297 | 57 | 0.7947 |
| Generic 400G Multimode | 150 | 0 | 0.0041 |
| Generic 200G Multimode | 4,209 | 8 | 0.1142 |
| RJ45 Cables | 25,980 | 51 | 0.7048 |
Compute Tray Networking Content
4 rows
Networking components inside the compute tray — accelerators, board-to-board connectors, retimers, and their per-tray bandwidth.
Assigned blockDefault
VR200 - NVL72 - Generic
Compute TrayXPU: VR200 NVL724 linesshared by 31 SKUs
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|---|---|---|---|---|---|
| XPUs per Tray | Rubin 200 | 4 | · | · | · | · |
| PCIe 6.0 Connector (Male) | NV Paladin Board to Board 32 Pin 4p8c (Male) | 2 | 512 | · | · | · |
| PCIe 6.0 Connector (Male) | NV Paladin Board to Board 64 Pin 4p16c (Male) | 8 | 1,024 | · | · | · |
| PCIe 6.0 Connector (Female) | NV Paladin Board to Board 32 Pin 4p8c (Female) | 4 | 512 | · | · | · |
| PCIe 6.0 Connector (Female) | NV Paladin Board to Board 64 Pin 4p16c (Female) | 16 | 1,024 | · | · | · |
| PCIe 6.0 Connector (Male) | NV Paladin Board to Board 32 Pin 4p8c (Male) | 2 | 512 | · | · | · |
| PCIe 6.0 Connector (Male) | NV Paladin Board to Board 64 Pin 4p16c (Male) | 8 | 1,024 | · | · | · |
Notes
- PCIe 6.0 Connector (Male) · NV Paladin Board to Board 32 Pin 4p8c (Male) — 2 pins = 1DP
- PCIe 6.0 Connector (Male) · NV Paladin Board to Board 64 Pin 4p16c (Male) — 2DP = 1Lane
Compute Tray Parts Summary
4
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| NV Paladin Board to Board 32 Pin 4p8c (Male) | 36,864 | 72.00 | 1.00 |
| NV Paladin Board to Board 64 Pin 4p16c (Male) | 147,456 | 288.00 | 4.00 |
| NV Paladin Board to Board 32 Pin 4p8c (Female) | 36,864 | 72.00 | 1.00 |
| NV Paladin Board to Board 64 Pin 4p16c (Female) | 147,456 | 288.00 | 4.00 |