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Neoclouds/AI Lab/SovAI 36864 VR200 CPX CX-9 Hyperscaler Infiniband Cluster Configuration

OTHER-VeraRubin CPX-IB-4R

Neoclouds/AI Lab/SovAI · VR200 CPX · CX-9

Rack type
Cluster / location
Default VR200 CPX
Buyer profile
Emerging Neocloud
Networking type
Infiniband
Number of XPUs
36,864
NIC used
CX-9
NICs / XPU
2
Scale-out BW / XPU
800G
XPU / server
144

Scale-up network

Assigned blockDefault
VR200 CPX
Scale-UpXPU: VR200 CPX0 linesshared by 2 SKUs

Scale-up Units are based on the scale-up world size (144 XPUs).

XPU World Size

2
WS
Scale-Up Network LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
XPUs per Node·8···
Scale-Up World Size·1440··

Switches

1
SW
Scale-Up Network LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
Scale-Up Switch Total··0··
Notes
  • Scale-Up World Size — >>18 trays of 8 CPX per rack

Scale-Up Parts Summary

0
ItemQty/ClusterQty/ServerAttach/XPU

Backend network

3 rows
Assigned blockDefault
VR200 CPX - Rubin CPX - 3L - IB - X800-Q3400-RA - Generic
BackendXPU: VR200 CPX3 linesshared by 1 SKU

Backend Units are based on the cluster size (36,864 XPUs).

Switches

5
SW
 Network Layer
Switch and Server SpecAggregate Port UtilizationNetwork 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·36,864800800036,86436,864036,86436,864029,491.2·
NICs per NodeRubin CPX16800···8······
LeafQuantum-X800-Q3400-RA (Air Cooled)512115,200800727214436,86436,86473,72829,491.229,491.21
SpineQuantum-X800-Q3400-RA (Air Cooled)512115,200800727214436,86436,86473,72829,491.229,491.21
CoreQuantum-X800-Q3400-RA (Air Cooled)256115,200800144·14436,864036,86429,491.20·

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 NodesNvidia LinkX 1.6T DR8 (SiPho)36,86436,864800810029,491.2
Leaf
DownlinkNvidia LinkX 1.6T DR8 (SiPho)18,432361,600820029,491.2
UplinkNvidia LinkX 1.6T DR8 (SiPho)18,432361,600820029,491.2
Spine
DownlinkNvidia LinkX 1.6T DR8 (SiPho)18,432361,600820029,491.2
UplinkNvidia LinkX 1.6T DR8 (SiPho)18,432361,600820029,491.2
Core
DownlinkNvidia LinkX 1.6T DR8 (SiPho)18,432721,600820029,491.2
Uplink·······
Super-Core

Cables

6
CB
 Network Layer
Cable/ FiberType
Total Units#
Units per Transceiver#
Unit BWGbit/s
Lane Count#
SerDes BWGbit/s
XPU NodesNvidia LinkX 800G DR4 Single Mode36,86418004200
Leaf
DownlinkAlready counted above·····
UplinkNvidia LinkX 800G DR4 Single Mode36,86428004200
Spine
DownlinkAlready counted above·····
UplinkNvidia LinkX 800G DR4 Single Mode36,86428004200
Core
DownlinkAlready counted above·····
Uplink······
Super-Core

Backend Parts Summary

3
ItemQty/ClusterQty/ServerAttach/XPU
Nvidia LinkX 1.6T DR8 (SiPho)129,024504.003.50
Nvidia LinkX 800G DR4 Single Mode110,592432.003.00
Quantum-X800-Q3400-RA (Air Cooled)1,2805.000.03

Frontend network

11 rows
Assigned blockDefault
VR200 CPX - SN6600 - Generic
FrontendXPU: VR200 CPX11 linesshared by 1 SKU

Converged Frontend + Storage Fabric

11
LayerPart / ModelUnitsAttach / XPU
·Spectrum-6 102.4T x1600 (SN6600)4430.0120
·Spectrum-4 25.6T (SN5400)20.0000
·Spectrum-3 12.8T (SN4700)660.0018
·Spectrum-2 1GbE (SN2201)5410.0147
·Nvidia LinkX 1.6T DR8 (SiPho)21,4070.5807
·Nvidia LinkX 800G DR421,2960.5777
·Nvidia LinkX 200G SR49,4500.2563
·Nvidia LinkX 800G Multimode29,2970.7947
·Nvidia LinkX 400G Multimode1500.0041
·Nvidia LinkX 200G Multimode4,2090.1142
·RJ45 Cables25,9800.7048

Frontend Parts Summary

11
ItemQty/ClusterQty/ServerAttach/XPU
Spectrum-6 102.4T x1600 (SN6600)44320.0120
Spectrum-4 25.6T (SN5400)200.0001
Spectrum-3 12.8T (SN4700)6600.0018
Spectrum-2 1GbE (SN2201)54120.0147
Nvidia LinkX 1.6T DR8 (SiPho)21,407840.5807
Nvidia LinkX 800G DR421,296830.5777
Nvidia LinkX 200G SR49,450370.2563
Nvidia LinkX 800G Multimode29,2971140.7947
Nvidia LinkX 400G Multimode15010.0041
Nvidia LinkX 200G Multimode4,209160.1142
RJ45 Cables25,9801010.7048

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 CPX - Generic
Compute TrayXPU: VR200 CPX4 linesshared by 2 SKUs
Tray layerPart / ModelUnits per Tray
Unit BWGb/s
Lanes
Lane BWGb/s
Per switch
XPUs per TrayRubin CPX8····
PCIe 6.0 Connector (Male)NV Paladin Board to Board 32 Pin 4p8c (Male)2512···
PCIe 6.0 Connector (Male)NV Paladin Board to Board 64 Pin 4p16c (Male)81,024···
PCIe 6.0 Connector (Female)NV Paladin Board to Board 32 Pin 4p8c (Female)4512···
PCIe 6.0 Connector (Female)NV Paladin Board to Board 64 Pin 4p16c (Female)161,024···
PCIe 6.0 Connector (Male)NV Paladin Board to Board 32 Pin 4p8c (Male)2512···
PCIe 6.0 Connector (Male)NV Paladin Board to Board 64 Pin 4p16c (Male)81,024···
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
ItemQty/ClusterQty/ServerAttach/XPU
NV Paladin Board to Board 32 Pin 4p8c (Male)18,43272.000.50
NV Paladin Board to Board 64 Pin 4p16c (Male)73,728288.002.00
NV Paladin Board to Board 32 Pin 4p8c (Female)18,43272.000.50
NV Paladin Board to Board 64 Pin 4p16c (Female)73,728288.002.00