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Neocloud Giant 18432 GB200 NVL72 CX-7 Neocloud Giant Spectrum X Cluster Configuration

NG-GB200 NVL72-SX-4R-3L

Neocloud Giant · GB200 · CX-7

Rack type
NVL72
Cluster / location
Default GB200 4-Rail/ 3-Layer
Buyer profile
Neocloud Giant
Networking type
Spectrum X
Number of XPUs
18,432
NIC used
CX-7
NICs / XPU
1
Scale-out BW / XPU
400G
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 LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
XPUs per Node·47,20018400
Scale-Up World Size·72518,400··

Switches

2
SW
Scale-Up Network LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
per SwitchNvidia NVSwitch 5.0 (NVLink 5)1828,80072400
Scale-Up Switch Total·18518,400··

Connections & cabling

8
CN
Scale-Up Network LayerPart / Model
Units#
BW / PortGbit/s uni-d
Unit DP#
DP / Port#
Total DPs#
BW / ConnectorCable / Model
Cable Units#
Ultrapass to SwitchNV 2 UltraPass OverPass 144 DP 224Gb/s3640014445,18414,400··
Male ConnectorsNV Paladin HD2 224Gb/s 144 DP (Male)3640014445,18414,400Already Counted Below·
Female ConnectorsNV Paladin HD2 224Gb/s 144 DP (Female)3640014445,18414,400Already Counted Below·
Switch Total** Two connectors per switch·····28,800··
Male ConnectorsNV Paladin HD2 224Gb/s 72 DP (Male)724007245,1847,200Already Counted Below·
Female ConnectorsNV Paladin HD2 224Gb/s 72 DP (Female)724007245,1847,200NV 224Gb/s SkewClear EXD Gen 2 Cable5,184
XPU Total** One connector per GPU·····7,200··
·NVL Spine Chassis (NvLink 5)2·······

Scale-Up Parts Summary

8
ItemQty/ClusterQty/ServerAttach/XPU
Nvidia NVSwitch 5.0 (NVLink 5)4,60818.000.25
NV 2 UltraPass OverPass 144 DP 224Gb/s9,21636.000.50
NV Paladin HD2 224Gb/s 144 DP (Male)9,21636.000.50
NV Paladin HD2 224Gb/s 144 DP (Female)9,21636.000.50
NV Paladin HD2 224Gb/s 72 DP (Male)18,43272.001.00
NV Paladin HD2 224Gb/s 72 DP (Female)18,43272.001.00
NV 224Gb/s SkewClear EXD Gen 2 Cable1,327,1045,184.0072.00
NVL Spine Chassis (NvLink 5)5122.000.03

Backend network

5 rows
Assigned blockDefault
GB200 - NVL72 - CX7 - 3L - ETH - SN5600 - Generic
BackendXPU: GB200 NVL725 linesshared by 1 SKU

Backend Units are based on the cluster size (18,432 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·18,432400400018,43218,432018,43218,43207,372.8·
NICs per NodeConnectX-7 NIC - 400G4400···8······
LeafSpectrum-4 51.2T (SN5600)51251,200400363612818,43218,43265,5367,372.87,372.81
SpineSpectrum-4 51.2T (SN5600)28851,200400646412818,43218,43236,8647,372.87,372.81
CoreSpectrum-4 51.2T (SN5600)14451,200400128·12818,432018,4327,372.80·

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 400G DR418,43218,43240041007,372.8
Leaf
DownlinkNvidia LinkX 800G DR89,2161880081007,372.8
UplinkNvidia LinkX 800G DR89,2161880081007,372.8
Spine
DownlinkNvidia LinkX 800G DR89,2163280081007,372.8
UplinkNvidia LinkX 800G DR89,2163280081007,372.8
Core
DownlinkNvidia LinkX 800G DR89,2166480081007,372.8
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 400G Multimode18,43214004100
Leaf
DownlinkAlready counted above·····
UplinkNvidia LinkX 400G Multimode18,43224004100
Spine
DownlinkAlready counted above·····
UplinkNvidia LinkX 400G Multimode18,43224004100
Core
DownlinkAlready counted above·····
Uplink······
Super-Core

Backend Parts Summary

5
ItemQty/ClusterQty/ServerAttach/XPU
Nvidia LinkX 400G DR418,43272.001.00
Nvidia LinkX 400G Multimode55,296216.003.00
Nvidia LinkX 800G DR846,080180.002.50
ConnectX-7 NIC - 400G18,43272.001.00
Spectrum-4 51.2T (SN5600)9443.690.05
Notes
  • Leaf · Spectrum-4 51.2T (SN5600) — >> Empty Ports

Frontend network

11 rows
Assigned blockDefault
GB200 - NVL72 - SN5600 - Generic
FrontendXPU: GB200 NVL7211 linesshared by 5 SKUs

Converged Frontend + Storage Fabric

11
LayerPart / ModelUnitsAttach / XPU
·Spectrum-4 51.2T (SN5600)2210.0120
·Spectrum-3 12.8T (SN4700)10.0000
·Spectrum-2 6.4T (SN3700)330.0018
·Spectrum-2 1GbE (SN2201)2710.0147
·Nvidia LinkX 800G SR810,7040.5807
·Nvidia LinkX 400G SR410,6480.5777
·Nvidia LinkX 100G SR4 QSFP284,7250.2563
·Nvidia LinkX 800G Multimode14,6490.7947
·Nvidia LinkX 400G Multimode750.0041
·Nvidia LinkX 100G Multimode2,1050.1142
·RJ45 Cables12,9900.7048

Frontend Parts Summary

11
ItemQty/ClusterQty/ServerAttach/XPU
Spectrum-4 51.2T (SN5600)1,89370.1027
Spectrum-3 12.8T (SN4700)800.0004
Spectrum-2 6.4T (SN3700)28210.0153
Spectrum-2 1GbE (SN2201)2,31590.1256
Nvidia LinkX 800G SR891,5753584.9682
Nvidia LinkX 400G SR491,0983564.9424
Nvidia LinkX 100G SR4 QSFP2840,4251582.1932
Nvidia LinkX 800G Multimode125,3284906.7995
Nvidia LinkX 400G Multimode64130.0348
Nvidia LinkX 100G Multimode18,007700.9769
RJ45 Cables111,1384346.0296

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 layerPart / ModelUnits per Tray
Unit BWGb/s
Lanes
Lane BWGb/s
Per switch
XPUs per TrayBlackwell 2004····
Bianca BoardNV MCIO PCIe x16 Connector2····
Bianca BoardNV MCIO PCIe x16 Cable2····
Mezz Board to OSFPNV DensiLink OverPass to OSFP Cage4····

Compute Tray Parts Summary

3
ItemQty/ClusterQty/ServerAttach/XPU
NV MCIO PCIe x16 Connector9,21636.000.50
NV MCIO PCIe x16 Cable9,21636.000.50
NV DensiLink OverPass to OSFP Cage18,43272.001.00