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Amazon 131072 P6-B300 NVL8 Nitro-v6 Hyperscaler EFA Cluster Configuration
AWS-P6-B300 NVL8-EFA-WB
Amazon · B300 · Nitro-v6
Rack type
P6 NVL8
Cluster / location
GB300 NVL72 Clusters
Buyer profile
Hyperscaler
Networking type
EFA
Number of XPUs
131,072
NIC used
Nitro-v6
NICs / XPU
2
Scale-out BW / XPU
800G
XPU / server
72
Scale-up network
1 rows
Assigned blockDefault
B300 - NVL8
Scale-UpXPU: B300 NVL81 lineshared 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 | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| XPUs per Node | · | 8 | 7,200 | 18 | 400 |
| Scale-Up World Size | · | 8 | 57,600 | · | · |
Switches
2
SW| Scale-Up Network Layer | Part / Model | Units# | Unit BWGbit/s uni-d | Port Count# | Port BWGbit/s uni-d |
|---|---|---|---|---|---|
| per Switch | Nvidia NVSwitch 5.0 (NVLink 5) | 1 | 28,800 | 72 | 400 |
| Scale-Up Switch Total | Nvidia NVSwitch 5.0 (NVLink 5) | 2 | 57,600 | 72 | · |
Scale-Up Parts Summary
1
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Nvidia NVSwitch 5.0 (NVLink 5) | 32,768 | 2.00 | 0.25 |
Backend network
7 rows
Assigned blockDefault
B300 - P6 NVL8 - EFAv4 - 3L - ETH - TH3 - AWS
BackendXPU: B300 P6 NVL87 linesshared by 1 SKU
Backend Units are based on the cluster size (131,072 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 | · | 131,072 | 800 | 800 | 0 | 131,072 | 131,072 | 0 | 131,072 | 131,072 | 0 | 104,857.6 | · |
| NICs per Node | EFAv4 Nitro-v6 400G NIC | 16 | 400 | 800 | · | · | 8 | · | · | · | · | · | · |
| ToR | WhiteBox Tomahawk 3 12.8T | 16,384 | 12,800 | 400 | 16 | 16 | 32 | 262,144 | 262,144 | 524,288 | 104,857.6 | 104,857.6 | 1 |
| Leaf | WhiteBox Tomahawk 5 51.2T | 4,096 | 51,200 | 400 | 64 | 64 | 128 | 262,144 | 262,144 | 524,288 | 104,857.6 | 104,857.6 | 1 |
| Spine | WhiteBox Tomahawk 5 51.2T | 2,048 | 51,200 | 400 | 128 | 0 | 128 | 262,144 | 0 | 262,144 | 104,857.6 | 0 | · |
Transceivers
8
CN Network Layer | Transceiver / CablePart Name / Model | Total Units# | Units per SW/GPU# | Unit BWGbit/s | Lanes# | BW per LaneGbit/s | Agg. BWTbit/s |
|---|---|---|---|---|---|---|---|
| GPU Nodes | None - AECs are Used -> | 262,144 | 262,144 | 400 | 4 | 100 | 104,857.6 |
| CPU Nodes | None - AECs are Used -> | · | · | · | · | · | · |
| Leaf | |||||||
| Downlink | Generic 800G DR8 | 131,072 | 32 | 800 | 8 | 100 | 104,857.6 |
| Uplink | Generic 800G DR8 | 131,072 | #ERR | 800 | #ERR | 100 | 0 |
| Spine | |||||||
| Downlink | Generic 800G DR8 | 131,072 | #ERR | 800 | #ERR | 100 | 0 |
| Uplink | · | · | · | · | · | · | · |
| Core | |||||||
| Downlink | · | · | · | · | · | · | · |
| Uplink | · | · | · | · | · | · | · |
| Super-Core | |||||||
| ToR | |||||||
| Downlink | None - AECs are Used -> | 262,144 | 8 | 400 | 8 | 100 | 104,857.6 |
| Uplink | Generic 400G DR4 | 262,144 | 8 | 400 | 8 | 100 | 104,857.6 |
Cables
8
CB Network Layer | Cable/ FiberType | Total Units# | Units per Transceiver# | Unit BWGbit/s | Lane Count# | SerDes BWGbit/s |
|---|---|---|---|---|---|---|
| GPU Nodes | Generic 400G AEC | 262,144 | 1 | 400 | 4 | 100 |
| CPU Nodes | · | · | · | · | · | · |
| Leaf | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 400G Single Mode | 262,144 | 2 | 400 | 4 | 100 |
| Spine | ||||||
| Downlink | · | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Core | ||||||
| Downlink | · | · | · | · | · | · |
| Uplink | · | · | · | · | · | · |
| Super-Core | ||||||
| ToR | ||||||
| Downlink | Already counted above | · | · | · | · | · |
| Uplink | Generic 400G Single Mode | 262,144 | 1 | 400 | 4 | 100 |
Backend Parts Summary
7
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Generic 400G AEC | 262,144 | 144.00 | 2.00 |
| EFAv4 Nitro-v6 400G NIC | 262,144 | 144.00 | 2.00 |
| Generic 400G DR4 | 262,144 | 144.00 | 2.00 |
| Generic 400G Single Mode | 524,288 | 288.00 | 4.00 |
| WhiteBox Tomahawk 3 12.8T | 16,384 | 9.00 | 0.13 |
| Generic 800G DR8 | 393,216 | 216.00 | 3.00 |
| WhiteBox Tomahawk 5 51.2T | 6,144 | 3.38 | 0.05 |
Frontend network
No converged frontend + storage fabric data for this cluster.
Frontend Parts Summary
0
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|
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
B300 - P6 NVL8 - AWS
Compute TrayXPU: B300 P6 NVL83 linesshared by 1 SKU
| Tray layer | Part / Model | Units per Tray | Unit BWGb/s | Lanes | Lane BWGb/s | Per switch |
|---|---|---|---|---|---|---|
| XPUs per Tray | Blackwell 300 | 8 | · | · | · | · |
| Compute Tray | Astera Labs Scorpio-P 64-Lane PCIe Gen 6.0 | 8 | · | · | · | · |
| GPU to CPU Tray | Generic PCIe Gen6 x16 2-meter DAC | 8 | · | · | · | · |
| Extra NICs | ConnectX-8 NIC - 800G | 8 | · | · | · | · |
Compute Tray Parts Summary
3
| Item | Qty/Cluster | Qty/Server | Attach/XPU |
|---|---|---|---|
| Astera Labs Scorpio-P 64-Lane PCIe Gen 6.0 | 131,072 | 72.00 | 1.00 |
| Generic PCIe Gen6 x16 2-meter DAC | 131,072 | 72.00 | 1.00 |
| ConnectX-8 NIC - 800G | 131,072 | 72.00 | 1.00 |