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Oracle 131072 GB200 NVL72 CX-8 Hyperscaler Ethernet Cluster Configuration
OCI-GB200 NVL72-CX8-SX5-8P-2L
Oracle · GB200 · CX-8
Rack type
NVL72
Cluster / location
2-Tier GB200 SX
Buyer profile
Hyperscaler
Networking type
Ethernet
Number of XPUs
131,072
NIC used
CX-8
NICs / XPU
1
Scale-out BW / XPU
800G
XPU / server
72
Scale-up network
8 rows
Assigned blockDefault
GB200 - NVL72
Scale-UpXPU: GB200 NVL728 linesshared by 10 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 | Lane Count# | Lane BWGbit/s uni-d |
|---|---|---|---|---|---|
| XPUs per Node | · | 4 | 7,200 | 18 | 400 |
| Scale-Up World Size | · | 72 | 518,400 | · | · |
Switches
2
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Lane Count# | Lane BWGbit/s uni-d |
|---|---|---|---|---|---|
| per Switch | Nvidia NVSwitch 5.0 (NVLink 5) | 18 | 28,800 | 72 | 400 |
| Scale-Up Switch Total | · | 18 | 518,400 | · | · |
Connections & cabling
8
CN| Scale-Up Network Layer | Part / Model | Units# | BW / PortGbit/s uni-d | Unit DP# | DP / Port# | Total DPs# | BW / Connector | Cable / Model | Cable Units# |
|---|---|---|---|---|---|---|---|---|---|
| Ultrapass to Switch | NV 2 UltraPass OverPass 144 DP 224Gb/s | 36 | 400 | 144 | 4 | 5,184 | 14,400 | · | · |
| Male Connectors | NV Paladin HD2 224Gb/s 144 DP (Male) | 36 | 400 | 144 | 4 | 5,184 | 14,400 | Already Counted Below | · |
| Female Connectors | NV Paladin HD2 224Gb/s 144 DP (Female) | 36 | 400 | 144 | 4 | 5,184 | 14,400 | Already Counted Below | · |
| Switch Total | ** Two connectors per switch | · | · | · | · | · | 28,800 | · | · |
| Male Connectors | NV Paladin HD2 224Gb/s 72 DP (Male) | 72 | 400 | 72 | 4 | 5,184 | 7,200 | Already Counted Below | · |
| Female Connectors | NV Paladin HD2 224Gb/s 72 DP (Female) | 72 | 400 | 72 | 4 | 5,184 | 7,200 | NV 224Gb/s SkewClear EXD Gen 2 Cable | 5,184 |
| XPU Total | ** One connector per GPU | · | · | · | · | · | 7,200 | · | · |
| · | NVL Spine Chassis (NvLink 5) | 2 | · | · | · | · | · | · | · |
Scale-Up Parts Summary
8
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Nvidia NVSwitch 5.0 (NVLink 5) | 32,768 | 18.00 | 0.25 |
| NV 2 UltraPass OverPass 144 DP 224Gb/s | 65,536 | 36.00 | 0.50 |
| NV Paladin HD2 224Gb/s 144 DP (Male) | 65,536 | 36.00 | 0.50 |
| NV Paladin HD2 224Gb/s 144 DP (Female) | 65,536 | 36.00 | 0.50 |
| NV Paladin HD2 224Gb/s 72 DP (Male) | 131,072 | 72.00 | 1.00 |
| NV Paladin HD2 224Gb/s 72 DP (Female) | 131,072 | 72.00 | 1.00 |
| NV 224Gb/s SkewClear EXD Gen 2 Cable | 9,437,184 | 5,184.00 | 72.00 |
| NVL Spine Chassis (NvLink 5) | 3,641 | 2.00 | 0.03 |
Backend network
5 rows
Assigned blockDefault
GB200 - NVL72 - CX8 - 2L - ETH - Spectrum-5 - OCI
BackendXPU: GB200 NVL725 linesshared by 1 SKU
Backend Units are based on the cluster size (131,072 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 | · | 131,072 | 800 | 100 | 0 | 1,048,576 | 1,048,576 | 0 | 1,048,576 | 1,048,576 | 0 | 104,857.6 | · |
| NICs per Node | ConnectX-8 NIC - 800G | 4 | 800 | 100 | · | · | 8 | · | · | · | · | · | · |
| Leaf | Spectrum-5 51.2T (SN56XX) 512 Radix | 4,096 | 51,200 | 100 | 256 | 256 | 512 | 1,048,576 | 1,048,576 | 2,097,152 | 104,857.6 | 104,857.6 | 1 |
| Spine | Spectrum-5 51.2T (SN56XX) 512 Radix | 2,048 | 51,200 | 100 | 512 | · | 512 | 1,048,576 | 0 | 1,048,576 | 104,857.6 | 0 | · |
Transceivers
4
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 | Credo 800G ZF Optics | 131,072 | 131,072 | 800 | 8 | 100 | 104,857.6 |
| Leaf | |||||||
| Downlink | Credo 800G ZF Optics | 131,072 | 32 | 800 | 8 | 100 | 104,857.6 |
| Uplink | Generic 800G DR8 | 131,072 | 32 | 800 | 8 | 100 | 104,857.6 |
| Spine | |||||||
| Downlink | Generic 800G DR8 | 131,072 | 64 | 800 | 8 | 100 | 104,857.6 |
| Uplink | · | · | · | · | · | · | · |
| Core | |||||||
| Downlink | · | · | · | · | · | · | · |
| Uplink | · | · | · | · | · | · | · |
| Super-Core | |||||||
Cables
4
CB Network Layer | Cable/ FiberType | Total Units# | Units per Transceiver# | Unit BWGbit/s | Lane Count# | SerDes BWGbit/s |
|---|---|---|---|---|---|---|
| XPU Nodes | Generic 800G Single Mode | 131,072 | 1 | 800 | 4 | 200 |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 800G Single Mode | 131,072 | 1 | 800 | 4 | 200 |
| Spine | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Core | ||||||
| Downlink | · | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Super-Core | ||||||
Backend Parts Summary
5
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Credo 800G ZF Optics | 262,144 | 144.00 | 2.00 |
| Generic 800G Single Mode | 262,144 | 144.00 | 2.00 |
| Generic 800G DR8 | 262,144 | 144.00 | 2.00 |
| ConnectX-8 NIC - 800G | 131,072 | 72.00 | 1.00 |
| Spectrum-5 51.2T (SN56XX) 512 Radix | 6,144 | 3.38 | 0.05 |
Frontend network
11 rows
Assigned blockDefault
GB200 - NVL72 - SN5600 - Generic
FrontendXPU: GB200 NVL7211 linesshared by 5 SKUs
Converged Frontend + Storage Fabric
11
| Layer | Part / Model | Units | Attach / XPU |
|---|---|---|---|
| · | Spectrum-4 51.2T (SN5600) | 1,573 | 0.0120 |
| · | Spectrum-3 12.8T (SN4700) | 7 | 0.0000 |
| · | Spectrum-2 6.4T (SN3700) | 234 | 0.0018 |
| · | Spectrum-2 1GbE (SN2201) | 1,924 | 0.0147 |
| · | Nvidia LinkX 800G SR8 | 76,114 | 0.5807 |
| · | Nvidia LinkX 400G SR4 | 75,717 | 0.5777 |
| · | Nvidia LinkX 100G SR4 QSFP28 | 33,600 | 0.2563 |
| · | Nvidia LinkX 800G Multimode | 104,168 | 0.7947 |
| · | Nvidia LinkX 400G Multimode | 533 | 0.0041 |
| · | Nvidia LinkX 100G Multimode | 14,967 | 0.1142 |
| · | RJ45 Cables | 92,375 | 0.7048 |
Frontend Parts Summary
11
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Spectrum-4 51.2T (SN5600) | 1,893 | 1 | 0.0144 |
| Spectrum-3 12.8T (SN4700) | 8 | 0 | 0.0001 |
| Spectrum-2 6.4T (SN3700) | 282 | 0 | 0.0021 |
| Spectrum-2 1GbE (SN2201) | 2,315 | 1 | 0.0177 |
| Nvidia LinkX 800G SR8 | 91,575 | 50 | 0.6987 |
| Nvidia LinkX 400G SR4 | 91,098 | 50 | 0.6950 |
| Nvidia LinkX 100G SR4 QSFP28 | 40,425 | 22 | 0.3084 |
| Nvidia LinkX 800G Multimode | 125,328 | 69 | 0.9562 |
| Nvidia LinkX 400G Multimode | 641 | 0 | 0.0049 |
| Nvidia LinkX 100G Multimode | 18,007 | 10 | 0.1374 |
| RJ45 Cables | 111,138 | 61 | 0.8479 |
Compute Tray Networking Content
3 rows
Networking components inside the compute tray — accelerators, board-to-board connectors, retimers, and their per-tray bandwidth.
Assigned blockDefault
GB200 - NVL72 - Generic
Compute TrayXPU: GB200 NVL723 linesshared by 10 SKUs
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|---|---|---|---|---|---|
| XPUs per Tray | Blackwell 200 | 4 | · | · | · | · |
| Bianca Board | NV MCIO PCIe x16 Connector | 2 | · | · | · | · |
| Bianca Board | NV MCIO PCIe x16 Cable | 2 | · | · | · | · |
| Mezz Board to OSFP | NV DensiLink OverPass to OSFP Cage | 4 | · | · | · | · |
Compute Tray Parts Summary
3
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| NV MCIO PCIe x16 Connector | 65,536 | 36.00 | 0.50 |
| NV MCIO PCIe x16 Cable | 65,536 | 36.00 | 0.50 |
| NV DensiLink OverPass to OSFP Cage | 131,072 | 72.00 | 1.00 |