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META-MI400X-THOR3-Eth-3L
META-MI400X-THOR3-Eth-3L
Meta · MI400X · Thor-3 800G NIC
Rack type
—
Cluster / location
MI400X - Ethernet Cluster
Buyer profile
Hyperscaler
Networking type
Ethernet
Number of XPUs
18,432
NIC used
Thor-3 800G NIC
NICs / XPU
3
Scale-out BW / XPU
2.4T
XPU / server
72
Scale-up network
7 rows
Assigned blockDefault
MI400X
Scale-UpXPU: MI400X7 linesshared by 5 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 | 14,400 | · | · |
| Scale-Up World Size | · | 72 | 1,036,800 | · | · |
Switches
2
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Lane Count# | Lane BWGbit/s uni-d |
|---|---|---|---|---|---|
| per Switch | Tomahawk 6 102.4T ASIC | 1 | 102,400 | · | · |
| Scale-Up Switch Total | · | 12 | 1,228,800 | · | · |
Connections & cabling
7
CN| Scale-Up Network Layer | Part / Model | Units# | BW / LaneGbit/s uni-d | Unit DP# | DP / Lane# | Total DPs# | BW / Connector | Cable / Model | Cable Units# |
|---|---|---|---|---|---|---|---|---|---|
| Male Connectors | UALoE 224Gb/s 432 DP (Male) | 24 | 200 | 432 | 2 | 10,368 | 43,200 | Already Counted Below | · |
| Female Connectors | UALoE 224Gb/s 432 DP (Female) | 24 | 200 | 432 | 2 | 10,368 | 43,200 | Already Counted Below | · |
| Switch Total | ** Two connectors per switch | · | · | · | · | · | 86,400 | · | · |
| Male Connectors | UALoE 224Gb/s 144 DP (Male) | 72 | 200 | 144 | 2 | 10,368 | 14,400 | Already Counted Below | · |
| Female Connectors | UALoE 224Gb/s 144 DP (Female) | 72 | 200 | 144 | 2 | 10,368 | 14,400 | 224Gb/s SkewClear EXD Gen 2 Cable | 10,368 |
| XPU Total | ** One connector per XPU | · | · | · | · | · | 14,400 | · | · |
| · | Spine Chassis for MI400X | 1 | · | · | · | · | · | · | · |
Scale-Up Parts Summary
7
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Tomahawk 6 102.4T ASIC | 3,072 | 12.00 | 0.17 |
| UALoE 224Gb/s 432 DP (Male) | 6,144 | 24.00 | 0.33 |
| UALoE 224Gb/s 432 DP (Female) | 6,144 | 24.00 | 0.33 |
| UALoE 224Gb/s 144 DP (Male) | 18,432 | 72.00 | 1.00 |
| UALoE 224Gb/s 144 DP (Female) | 18,432 | 72.00 | 1.00 |
| 224Gb/s SkewClear EXD Gen 2 Cable | 2,654,208 | 10,368.00 | 144.00 |
| Spine Chassis for MI400X | 256 | 1.00 | 0.01 |
Backend network
4 rows
Assigned blockDefault
MI400X - Thor3 - 3L - ETH - Minipack-4 OCP Rack - META
BackendXPU: MI400X4 linesshared by 1 SKU
Backend Units are based on the cluster size (18,432 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 | · | 18,432 | 2,400 | 1,600 | 0 | 27,648 | 27,648 | 0 | 27,648 | 27,648 | 0 | 44,236.8 | · |
| NICs per Node | Thor-3 800G NIC | 8 | · | 1,600 | · | · | 8 | · | · | · | · | · | · |
| Leaf | Minipack-4 OCP Rack 102.4T | 864 | 102,400 | 1,600 | 32 | 32 | 64 | 27,648 | 27,648 | 55,296 | 44,236.8 | 44,236.8 | 1 |
| Spine | Minipack-4 OCP Rack 102.4T | 864 | 102,400 | 1,600 | 32 | 32 | 64 | 27,648 | 27,648 | 55,296 | 44,236.8 | 44,236.8 | 1 |
| Core | Minipack-4 OCP Rack 102.4T | 432 | 102,400 | 1,600 | 64 | · | 64 | 27,648 | 0 | 27,648 | 44,236.8 | 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 | Generic 1.6T DR8 (SiPho) | 18,432 | 18,432 | 1,600 | 8 | 200 | 29,491.2 |
| Leaf | |||||||
| Downlink | Generic 1.6T DR8 (SiPho) | 27,648 | 32 | 1,600 | 8 | 200 | 44,236.8 |
| Uplink | Generic 1.6T DR8 (SiPho) | 27,648 | 32 | 1,600 | 8 | 200 | 44,236.8 |
| Spine | |||||||
| Downlink | Generic 1.6T DR8 (SiPho) | 27,648 | 32 | 1,600 | 8 | 200 | 44,236.8 |
| Uplink | Generic 1.6T DR8 (SiPho) | 27,648 | 32 | 1,600 | 8 | 200 | 44,236.8 |
| Core | |||||||
| Downlink | Generic 1.6T DR8 (SiPho) | 27,648 | 64 | 1,600 | 8 | 200 | 44,236.8 |
| Uplink | · | · | · | · | · | · | · |
| Super-Core | |||||||
Cables
6
CB Network Layer | Cable/ FiberType | Total Units# | Units per Transceiver# | Unit BWGbit/s | Lane Count# | SerDes BWGbit/s |
|---|---|---|---|---|---|---|
| XPU Nodes | Generic 800G Single Mode | 36,864 | 2 | 800 | 4 | 200 |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 800G Single Mode | 55,296 | 2 | 800 | 4 | 200 |
| Spine | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 800G Single Mode | 55,296 | 2 | 800 | 4 | 200 |
| Core | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Super-Core | ||||||
Backend Parts Summary
4
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Generic 1.6T DR8 (SiPho) | 156,672 | 612.00 | 8.50 |
| Generic 800G Single Mode | 147,456 | 576.00 | 8.00 |
| Thor-3 800G NIC | 36,864 | 144.00 | 2.00 |
| Minipack-4 OCP Rack 102.4T | 2,160 | 8.44 | 0.12 |
Frontend network
11 rows
Assigned blockDefault
MI400X - WhiteBox TH6 - Generic
FrontendXPU: MI400X11 linesshared by 5 SKUs
Converged Frontend + Storage Fabric
11
| Layer | Part / Model | Units | Attach / XPU |
|---|---|---|---|
| · | WhiteBox Tomahawk 6 102.4T | 221 | 0.0120 |
| · | WhiteBox Tomahawk 4 25.6T | 1 | 0.0000 |
| · | WhiteBox Tomahawk 3 12.8T | 33 | 0.0018 |
| · | WhiteBox Tomahawk 2 6.4T | 271 | 0.0147 |
| · | Generic 1.6T DR8 (SiPho) | 10,704 | 0.5807 |
| · | Generic 800G DR4 | 10,648 | 0.5777 |
| · | Generic 200G SR4 | 4,725 | 0.2563 |
| · | Generic 800G Multimode | 14,649 | 0.7947 |
| · | Generic 400G Multimode | 75 | 0.0041 |
| · | Generic 200G Multimode | 2,105 | 0.1142 |
| · | RJ45 Cables | 12,990 | 0.7048 |
Frontend Parts Summary
11
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| WhiteBox Tomahawk 6 102.4T | 1,573 | 6 | 0.0854 |
| WhiteBox Tomahawk 4 25.6T | 7 | 0 | 0.0004 |
| WhiteBox Tomahawk 3 12.8T | 234 | 1 | 0.0127 |
| WhiteBox Tomahawk 2 6.4T | 1,924 | 8 | 0.1044 |
| Generic 1.6T DR8 (SiPho) | 76,114 | 297 | 4.1295 |
| Generic 800G DR4 | 75,717 | 296 | 4.1079 |
| Generic 200G SR4 | 33,600 | 131 | 1.8229 |
| Generic 800G Multimode | 104,168 | 407 | 5.6515 |
| Generic 400G Multimode | 533 | 2 | 0.0289 |
| Generic 200G Multimode | 14,967 | 58 | 0.8120 |
| RJ45 Cables | 92,375 | 361 | 5.0116 |
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
MI400X - Generic
Compute TrayXPU: MI400X4 linesshared by 5 SKUs
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|---|---|---|---|---|---|
| XPUs per Tray | Rubin 200 | 4 | · | · | · | · |
| PCIe 6.0 Connector (Male) | Paladin Board to Board 32 Pin 4p8c (Male) | 2 | 512 | · | · | · |
| PCIe 6.0 Connector (Male) | Paladin Board to Board 64 Pin 4p16c (Male) | 8 | 1,024 | · | · | · |
| PCIe 6.0 Connector (Female) | Paladin Board to Board 32 Pin 4p8c (Female) | 4 | 512 | · | · | · |
| PCIe 6.0 Connector (Female) | Paladin Board to Board 64 Pin 4p16c (Female) | 16 | 1,024 | · | · | · |
| PCIe 6.0 Connector (Male) | Paladin Board to Board 32 Pin 4p8c (Male) | 2 | 512 | · | · | · |
| PCIe 6.0 Connector (Male) | Paladin Board to Board 64 Pin 4p16c (Male) | 8 | 1,024 | · | · | · |
Notes
- PCIe 6.0 Connector (Male) · Paladin Board to Board 32 Pin 4p8c (Male) — 2 pins = 1DP
- PCIe 6.0 Connector (Male) · Paladin Board to Board 64 Pin 4p16c (Male) — 2DP = 1Lane
Compute Tray Parts Summary
4
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Paladin Board to Board 32 Pin 4p8c (Male) | 18,432 | 72.00 | 1.00 |
| Paladin Board to Board 64 Pin 4p16c (Male) | 73,728 | 288.00 | 4.00 |
| Paladin Board to Board 32 Pin 4p8c (Female) | 18,432 | 72.00 | 1.00 |
| Paladin Board to Board 64 Pin 4p16c (Female) | 73,728 | 288.00 | 4.00 |