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Meta 16384 MTIA Gen 3 Thor-2 400G NIC Hyperscaler Ethernet Cluster Configuration
META-MTIA Gen 3-400G-Eth-3L
Meta · MTIA Gen 3 · Thor-2 400G NIC
Rack type
—
Cluster / location
All Other Clusters
Buyer profile
Hyperscaler
Networking type
Ethernet
Number of XPUs
16,384
NIC used
Thor-2 400G NIC
NICs / XPU
1
Scale-out BW / XPU
400G
XPU / server
72
Scale-up network
1 rows
Assigned blockDefault
MTIA Gen 3
Scale-UpXPU: MTIA Gen 31 lineshared by 1 SKU
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 | 4,800 | 48 | 100 |
| Scale-Up World Size | · | 72 | 345,600 | · | · |
Switches
2
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| per Switch | Tomahawk Ultra 51.2T ASIC | 1 | 51,200 | 512 | 100 |
| Scale-Up Switch Total | · | 8 | 409,600 | · | · |
Notes
- per Switch · Tomahawk Ultra 51.2T ASIC — >> 80 Empty Ports per switch? Guessing 100G lanes
Scale-Up Parts Summary
1
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Tomahawk Ultra 51.2T ASIC | 1,820 | 8.00 | 0.11 |
Backend network
5 rows
Assigned blockDefault
MTIA Gen 3 - Thor2 - 3L - ETH - Minipack-3 OCP Rack - META
BackendXPU: MTIA Gen 35 linesshared by 1 SKU
Backend Units are based on the cluster size (16,384 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 | · | 16,384 | 400 | 400 | 0 | 16,384 | 16,384 | 0 | 16,384 | 16,384 | 0 | 6,553.6 | · |
| NICs per Node | Thor-2 400G NIC | 4 | 400 | · | · | · | 8 | · | · | · | · | · | · |
| Leaf | Minipack-3 OCP Rack 51.2T | 256 | 51,200 | 800 | 32 | 32 | 64 | 8,192 | 8,192 | 16,384 | 6,553.6 | 6,553.6 | 1 |
| Spine | Minipack-3 OCP Rack 51.2T | 256 | 51,200 | 800 | 32 | 32 | 64 | 8,192 | 8,192 | 16,384 | 6,553.6 | 6,553.6 | 1 |
| Core | Minipack-3 OCP Rack 51.2T | 128 | 51,200 | 800 | 64 | · | 64 | 8,192 | 0 | 8,192 | 6,553.6 | 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 -> | 16,384 | 16,384 | 400 | 8 | 50 | 6,553.6 |
| Leaf | |||||||
| Downlink | None - AECs are Used -> | 8,192 | 32 | 800 | 8 | 100 | 6,553.6 |
| Uplink | Generic 800G DR8 | 8,192 | 32 | 800 | 8 | 100 | 6,553.6 |
| Spine | |||||||
| Downlink | Generic 800G DR8 | 8,192 | 32 | 800 | 8 | 100 | 6,553.6 |
| Uplink | Generic 800G DR8 | 8,192 | 32 | 800 | 8 | 100 | 6,553.6 |
| Core | |||||||
| Downlink | Generic 800G DR8 | 8,192 | 64 | 800 | 8 | 100 | 6,553.6 |
| 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 | Generic 800G Y Cable AEC | 8,192 | 0.5 | 800 | 4 | 200 |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 800G Single Mode | 8,192 | 1 | 800 | 4 | 200 |
| Spine | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 800G Single Mode | 8,192 | 1 | 800 | 4 | 200 |
| Core | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Super-Core | ||||||
Backend Parts Summary
5
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Generic 800G Y Cable AEC | 8,192 | 36.00 | 0.50 |
| Generic 800G DR8 | 32,768 | 144.00 | 2.00 |
| Generic 800G Single Mode | 16,384 | 72.00 | 1.00 |
| Thor-2 400G NIC | 16,384 | 72.00 | 1.00 |
| Minipack-3 OCP Rack 51.2T | 640 | 2.81 | 0.04 |
Frontend network
11 rows
Assigned blockDefault
MTIA Gen 3 - Minipack-3 - META
FrontendXPU: MTIA Gen 311 linesshared by 1 SKU
Converged Frontend + Storage Fabric
11
| Layer | Part / Model | Units | Attach / XPU |
|---|---|---|---|
| · | Minipack-3 OCP Rack 51.2T | 197 | 0.0120 |
| · | Minipack-1 OCP Rack 12.8T | 1 | 0.0000 |
| · | WhiteBox Tomahawk 2 6.4T | 29 | 0.0018 |
| · | Generic 1GbE Ethernet | 241 | 0.0147 |
| · | Generic 800G DR8 | 9,514 | 0.5807 |
| · | Generic 400G DR4 | 9,465 | 0.5777 |
| · | Generic 100G DR4 QSFP28 | 4,200 | 0.2563 |
| · | Generic 800G Single Mode | 13,021 | 0.7947 |
| · | Generic 400G Single Mode | 67 | 0.0041 |
| · | Generic 100G Single Mode | 1,871 | 0.1142 |
| · | RJ45 Cables | 11,547 | 0.7048 |
Frontend Parts Summary
11
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Minipack-3 OCP Rack 51.2T | 197 | 1 | 0.0120 |
| Minipack-1 OCP Rack 12.8T | 1 | 0 | 0.0001 |
| WhiteBox Tomahawk 2 6.4T | 29 | 0 | 0.0018 |
| Generic 1GbE Ethernet | 241 | 1 | 0.0147 |
| Generic 800G DR8 | 9,514 | 42 | 0.5807 |
| Generic 400G DR4 | 9,465 | 42 | 0.5777 |
| Generic 100G DR4 QSFP28 | 4,200 | 18 | 0.2563 |
| Generic 800G Single Mode | 13,021 | 57 | 0.7947 |
| Generic 400G Single Mode | 67 | 0 | 0.0041 |
| Generic 100G Single Mode | 1,871 | 8 | 0.1142 |
| RJ45 Cables | 11,547 | 51 | 0.7048 |
Compute Tray Networking Content
Networking components inside the compute tray — accelerators, board-to-board connectors, retimers, and their per-tray bandwidth.
Assigned blockDefault
MTIA Gen 3 - META
Compute TrayXPU: MTIA Gen 30 linesshared by 1 SKU
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|
Compute Tray Parts Summary
0
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|