Quantum-3 / Quantum-X800 technical selection questions
Technical evaluation questions with variant-specific scope and sources.
Quantum-3 / Quantum-X800 technical selection questions
These questions are prepared from the cited technical documentation and clearly scoped owner inputs. They are not a measured frequency ranking. Keep the applicability line with each answer; do not transfer board, cooling, crypto, protocol, cable length or firmware facts between variants.
How are Q3400-RA and Q3401-RD ports arranged?
Applicable canonical content subjects: 920-9B36F-00RX-8S0.
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.
Public references
- NVIDIA Q32xx and Q34xx XDR 800Gb/s InfiniBand Switch Systems User Manual | NVIDIA Q32xx and Q34xx XDR 800Gb/s InfiniBand Switch Systems User Manual
- Introduction | NVIDIA Q32xx and Q34xx XDR 800Gb/s InfiniBand Switch Systems User Manual
What is the practical difference between Q3400-RA and Q3401-RD power?
Applicable canonical content subjects: 920-9B36F-00RX-8S0.
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.
Public references
Does a power supply listing prove the required power cord is included?
Applicable canonical content subjects: 920-9B36F-00RX-8S0.
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.
Public references
- Accessory and Replacement Parts | QM97XX 1U NDR 400Gbps InfiniBand Switch Systems User Manual
- NVIDIA Q32xx and Q34xx XDR 800Gb/s InfiniBand Switch Systems User Manual | NVIDIA Q32xx and Q34xx XDR 800Gb/s InfiniBand Switch Systems User Manual
Can I select a replacement by appearance or wattage alone?
Applicable canonical content subjects: 920-9B36F-00RX-8S0.
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.
Public references
- Accessory and Replacement Parts | NVIDIA Spectrum-3 SN4000 1U and 2U Switch Systems Hardware User Manual
- Accessory and Replacement Parts | NVIDIA Spectrum-4 SN5000 2U Switch Systems Hardware User Manual
Does a public ordering or compatibility entry prove stock and delivery?
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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.
Public references
- QM97XX 1U NDR 400Gbps InfiniBand Switch Systems User Manual | QM97XX 1U NDR 400Gbps InfiniBand Switch Systems User Manual
- Ordering Information | NVIDIA Spectrum-4 SN5000 2U Switch Systems Hardware User Manual
Where does NVIDIA document Q3400-RA in an AI-cluster design?
Applicable canonical content subjects: 920-9B36F-00RX-8S0.
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.