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Google 147456 TPUv7x (Ironwood) NIC - 200G Hyperscaler Ethernet Cluster Configuration

GOOG-TPUv7x-800G-Eth-WB-9216

Google · TPUv7x (Ironwood) · NIC - 200G

Rack type
—
Cluster / location
TPUv7x 3D Torus Cluster - 800G Version
Buyer profile
Hyperscaler
Networking type
Ethernet
Number of XPUs
147,456
NIC used
NIC - 200G
NICs / XPU
0.5
Scale-out BW / XPU
100G
XPU / server
9,216

Scale-up network

Assigned blockDefault
TPUv7x (Ironwood)
Scale-UpXPU: TPUv7x (Ironwood)0 linesshared by 2 SKUs

Scale-up Units are based on the scale-up world size (9,216 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·9,216···
Scale-Up World Size·9,216···

Switches

2
SW
Scale-Up Network LayerPart / Model
Units#
Unit BWGbit/s uni-d
Lane Count#
Lane BWGbit/s uni-d
per World144x144 Port OCS48···
per Scale-Up·768···

Google ICI Networking

3D Torus Worksheet
17

Scale-Up Network Worksheet (per Scale-Up World Size) — per-TPU ICI connectivity by connector type, from the config workbook.

ConnectorPart / ModelTPUs
per TPU Units#
Units#
Unit BWGbit/s
Lane Count#
SerDes BWGbit/s
Attach Ratio# per GPU
Cluster Total#
TPU Rack64
Interior TPUs8
Copper Cable800G Copper4168008100
PCBPCB28
OpticalGeneric 800G FR8008008100
Corner TPUs8
Copper Cable800G Copper148008100
PCBPCB28
OpticalGeneric 800G FR83248008100
Edge TPUs24
Copper Cable800G Copper2248008100
PCBPCB224
OpticalGeneric 800G FR82488008100
Face TPUs24
Copper Cable800G Copper3368008100
PCBPCB224
OpticalGeneric 800G FR81248008100
Total for TPU Rack64
Copper Cable800G Copper808008100
ActiveNo Active Copper for 800G
PassiveGeneric 800G DAC8080081001.25184,320
PCBPCB56
OpticalGeneric 800G FR89680081001.5221,184

Scale-Up Parts Summary

2
ItemQty/ClusterQty/ServerAttach/XPU
Generic 800G DAC184,32011,520.001.25
Generic 800G FR8221,18413,824.001.50

Backend network

6 rows
Assigned blockDefault
TPUv7x (Ironwood) - 200G NIC - 4L - ETH - TH3 - GOOG
BackendXPU: TPUv7x (Ironwood)6 linesshared by 1 SKU

Backend Units are based on the cluster size (147,456 TPUs).

Switches

7
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
TPUs·147,456100200073,72873,728073,72873,728014,745.6·
TPUs per Node·4····1······
NICs per NodeNIC - 200G2200200··1······
ToRWhiteBox Tomahawk 3 12.8T4,60812,80020016166473,72873,728294,91214,745.614,745.61
LeafWhiteBox Tomahawk 4 25.6T1,15225,600200646412873,72873,728147,45614,745.614,745.61
SpineWhiteBox Tomahawk 4 25.6T1,15225,600200646412873,72873,728147,45614,745.614,745.61
4 Aggregation Blocks
Core300x300 Port OCS288·200288288082,94482,944016,588.816,588.81

Transceivers

10
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 NodesGeneric 200G DR4 QSFP56147,456147,45620045029,491.2
Leaf
DownlinkGeneric 200G DR4 QSFP5673,7286420045014,745.6
UplinkGeneric 200G DR4 QSFP5673,7286420045014,745.6
Spine
DownlinkGeneric 200G DR4 QSFP5673,72864200#ERR5016,588.8
UplinkGeneric 200G FR473,72864200#ERR5016,588.8
Core
Downlink·82,944288200··0
Uplink·82,944288200··14,745.6
Super-CoreOCS is Circular, 288 North, 288 South······
ToR
DownlinkGeneric 200G DR4 QSFP5673,7281620045014,745.6
UplinkGeneric 200G DR4 QSFP5673,7281620045014,745.6

Cables

10
CB
 Network Layer
Cable/ FiberType
Total Units#
Units per Transceiver#
Unit BWGbit/s
Lane Count#
SerDes BWGbit/s
XPU NodesGeneric 200G Single Mode147,4561200450
Leaf
DownlinkAlready counted above·····
UplinkGeneric 200G Single Mode73,7281200450
Spine
DownlinkAlready counted above·····
Uplink·73,7281200450
Core
DownlinkAlready counted above·····
Uplink······
Super-Core······
ToR
DownlinkAlready counted above·····
UplinkGeneric 200G Single Mode73,7281200450

Backend Parts Summary

6
ItemQty/ClusterQty/ServerAttach/XPU
Generic 200G DR4 QSFP56516,09632,256.003.50
Generic 200G Single Mode294,91218,432.002.00
NIC - 200G322.000.00
WhiteBox Tomahawk 3 12.8T4,608288.000.03
WhiteBox Tomahawk 4 25.6T2,304144.000.02
Generic 200G FR473,7284,608.000.50

Frontend network

No converged frontend + storage fabric data for this cluster.

Frontend Parts Summary

0
ItemQty/ClusterQty/ServerAttach/XPU

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
TPUv7x (Ironwood) - Generic
Compute TrayXPU: TPUv7x (Ironwood)1 lineshared by 2 SKUs
Tray layerPart / ModelUnits per Tray
Unit BWGb/s
Lanes
Lane BWGb/s
Per switch
XPUs per TrayTPUv7x (Ironwood)4····
TPU Tray to Host TrayPCIe 5.0 x16 Cable4512···

Compute Tray Parts Summary

1
ItemQty/ClusterQty/ServerAttach/XPU
PCIe 5.0 x16 Cable147,4569,216.001.00