Manufacturer reference image. Included components and condition follow the selected item.
NETWORK SWITCH
NVIDIA Q3400-RA XDR InfiniBand switch (Q3400-RA)
- Form factor
- 4U
- Power
- 8 power supplies; power cords excluded in ordering table
Before you order
- Confirm the exact SKU, part number, specification option and quantity.
- Confirm the host platform, port, electrical interface and firmware requirements.
- Confirm availability, lead time, destination and applicable service terms before payment.
| Form factor | 4U |
|---|---|
| Power | 8 power supplies; power cords excluded in ordering table |
| Airflow | C2P |
| Protocol | InfiniBand |
| Rack kit | Included in ordering description |
| Data cages | 72 × OSFP |
| Data ports | 144 × XDR 800 Gb/s |
| Part Number | Q3400-RA |
| AC input per PSU | 200–240 VAC, 10 A, 50/60 Hz |
| Operating temperature | 0–35°C, reverse airflow |
| Manufacturer lifecycle | P-Rel (literal manufacturer table label) |
| Weight with eight PSUs | 60 kg |
| Owner-confirmed airflow | C2P |
| Dimensions (H × W × D) | 177.8 × 438 × 850 mm |
| Maximum power with active cables | 7,000 W |
| Typical power with passive cables (ATIS) | 2,900 W |
Product questions & answers
Where does NVIDIA document Q3400-RA in an AI-cluster design?
The DGX B300 XDR SuperPOD components table names Q3400-RA order code 920-9B36F-00RX-8S0 for compute leaves and spines. It is a manufacturer reference architecture whose final bill of materials depends on the project; it is not a SwitchInfra customer-delivery claim.
Can I select a replacement by appearance or wattage alone?
Use the manufacturer replacement-parts table for the complete switch model and order code. Matching dimensions, connector shape or PSU wattage alone does not establish compatibility.
Does a power supply listing prove the required power cord is included?
Check the exact ordering row and quote. Some PSU rows explicitly include a cord; the Q3400-RA system ordering row explicitly excludes power cords. Cord region and electrical ratings still need checking.
Does a public ordering or compatibility entry prove stock and delivery?
No. Record the manufacturer’s published lifecycle wording separately from commercial availability. Stock, lead time, software entitlement, support and warranty require a current supplier quote.
How are Q3400-RA and Q3401-RD ports arranged?
Both are documented with 144 XDR data ports across 72 OSFP cages. NVIDIA also documents a separate fabric-management port, which should be considered separately in port planning.
What is the practical difference between Q3400-RA and Q3401-RD power?
The ordering table lists eight power supplies for Q3400-RA and 48 VDC busbar input for Q3401-RD. Both require the correct rack and cooling design; they are distinct purchase configurations.