Transceivers / Modules technical selection Q&A
Owner-confirmed and documentation-backed questions with explicit variant applicability and source boundaries.
These questions were prepared for technical evaluation from cited documentation. They are not a measured list of frequently asked customer questions. The applicability line belongs to each answer; do not transfer a statement between order-code, firmware, cooling, length, form-factor or crypto variants.
The products listed below are the applicable catalog references. Answers use owner-confirmed manufacturer-origin product data, scoped public documentation, or explicitly stated engineering guidance. Genuine conflicting values are qualified individually.
Is this an optical SFP?
Applicable catalog candidates: 980-9I251-00IS00.
No. MC3208411-T is a 1000BASE-T copper SFP with an RJ-45 line connector.
Public references: MC3208411-T 1GbE SFP 1000BASE-T product brief.
What is the supported reach?
Applicable catalog candidates: 980-9I251-00IS00.
The exact product description specifies up to 100 m. The brief describes Ethernet over Cat 5 cable; verify the full cable channel and host configuration.
Public references: MC3208411-T 1GbE SFP 1000BASE-T product brief, Validated and Supported Cables and Switches | ConnectX-6 Dx Firmware RN.
Can it support 10/100 Mb/s as well?
Applicable catalog candidates: 980-9I251-00IS00.
The product brief permits 10/100/1000BASE-T operation in host systems with SGMII. Do not infer these modes for an arbitrary SFP host.
Public references: MC3208411-T 1GbE SFP 1000BASE-T product brief.
What thermal and power checks matter?
Applicable catalog candidates: 980-9I251-00IS00.
The brief specifies 0–85°C case temperature, 1.05 W typical and 1.2 W maximum power, and warns that current/power exceed the base SFP MSA values. Check host acceptance.
Public references: MC3208411-T 1GbE SFP 1000BASE-T product brief.
Does SFP mechanical fit prove host compatibility?
Applicable catalog candidates: 980-9I251-00IS00.
No. Check the host firmware list and acceptance of the module power/current characteristics, especially for copper PHY modules.
Public references: MC3208411-T 1GbE SFP 1000BASE-T product brief.
Does 1.25 Gb/s signaling make this a faster Ethernet service?
Applicable catalog candidates: 980-9I251-00IS00.
No. The exact ordering description is a 1GbE BASE-T module. Distinguish physical signaling figures from the Ethernet service rate.
Public references: MC3208411-T 1GbE SFP 1000BASE-T product brief.
Is this one 800G optical port?
Applicable catalog candidates: 980-9I301-00NM00.
It contains two 400G optical ports in one twin-port OSFP, each using an MPO-12/APC connection. It is not the single-port 4x200G XDR design.
Which fiber and reach are specified?
Applicable catalog candidates: 980-9I301-00NM00.
Single-mode, 1310 nm-class 2xDR4 links up to 500 m are specified. The published reach assumes the documented optical path including two patch panels.
Why select the -FLT version?
Applicable catalog candidates: 980-9I301-00NM00.
NVIDIA identifies -NM-FLT for DGX H100. Its finned-top sibling is documented for Quantum-2 and Spectrum-4 switch cages; the cooling variants must remain distinct.
Which protocols are documented?
Applicable catalog candidates: 980-9I301-00NM00.
The exact -FLT OPN is listed with NDR and aggregate 800GE in the current CX7/CX8/CX9 matrices; its two optical ports remain 400G each.
Public references: Validated and Supported Cables and Switches | ConnectX-7 Firmware RN, Validated and Supported Cables and Switches | ConnectX-8 Firmware RN, Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
Can DR4 and FR4 be directly linked?
Applicable catalog candidates: 980-9I301-00NM00, 980-9IAK0-00XM00, 980-9IAS0-00XM00, 980-9IAS1-00XM00, 980-9IAT0-00XM00, 980-9IAY0-00XM00.
No. DR4 uses parallel optical channels; FR4 multiplexes wavelengths onto a fiber pair. Match the optical format at both ends.
Public references: Optical Transceivers and Cables for AI Networking | NVIDIA.
Is it safe to look into a connected optical port?
Applicable catalog candidates: 980-9I301-00NM00, 980-9IAK0-00XM00, 980-9IAS0-00XM00, 980-9IAS1-00XM00, 980-9IAT0-00XM00, 980-9IAY0-00XM00.
No. Never look directly into an energized optical port or connected fiber; its infrared light can be invisible.
Public references: NVIDIA Cable Management Guidelines and FAQ.
What connection does MMS4B10-XM800 provide?
Applicable catalog candidates: 980-9IAK0-00XM00.
The owner-confirmed model is an 800G single-port DR4 OSFP optic with MPO/APC, 1310 nm single-mode operation up to 500 m, RHS cooling and TRO signal processing. The exact 980 OPN is Ethernet-only.
Public references: Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
Is InfiniBand support established?
Applicable catalog candidates: 980-9IAK0-00XM00.
No. Its exact release row says InfiniBand NA and Ethernet 800GE. Do not infer XDR support from other 800G optical models.
Public references: Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
Can the 1.6T MMS4B10-XM manual supply its specifications?
Applicable catalog candidates: 980-9IAK0-00XM00.
No. A twin-port 1.6T family document is not exact evidence for this single-port 800G OPN. Power, lane mapping and operating temperature remain unfilled.
Public references: Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
What launch status should be shown?
Applicable catalog candidates: 980-9IAK0-00XM00.
The inspected CX9 release row says Early BOM. No production-availability, stock or fulfillment promise follows from that entry.
Public references: Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
What distinguishes XDR signaling from NDR?
Applicable catalog candidates: 980-9IAK0-00XM00, 980-9IAT0-00XM00, 980-9IAY0-00XM00.
XDR uses 200G-PAM4 signaling; NDR uses 100G-PAM4. Equal aggregate bandwidth alone does not establish interoperability.
Public references: Optical Transceivers and Cables for AI Networking | NVIDIA.
How is the 1.6T link presented optically?
Applicable catalog candidates: 980-9IAS0-00XM00, 980-9IAS1-00XM00.
The exact ordering row specifies twin-port 2xFR4 with two duplex-LC single-mode interfaces, nominal 1310 nm-class wavelengths and reach up to 2 km.
Public references: Ordering Information | NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver.
How should IHS and RHS be chosen?
Applicable catalog candidates: 980-9IAS0-00XM00, 980-9IAS1-00XM00.
NVIDIA describes IHS for air-cooled Quantum-3 / Spectrum-6 switches and RHS for liquid-cooled variants. Confirm the actual switch configuration.
Public references: NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver (up to 2km) | NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver.
What power should be used for planning?
Applicable catalog candidates: 980-9IAS0-00XM00, 980-9IAS1-00XM00.
The current product specification lists 28 W maximum. An older deprecated parts-list snippet is not the governing source.
Public references: Specifications | NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver, 800Gbps XDR parts list — deprecation notice.
Is the per-port optical lane statement ready to publish?
Applicable catalog candidates: 980-9IAS0-00XM00, 980-9IAS1-00XM00.
No. The page contains conflicting channel/rate wording. This package keeps the confirmed 2xFR4 identity and electrical lane data while holding the inconsistent optical lane statement.
Public references: NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver (up to 2km) | NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver, Specifications | NVIDIA MMS4A50 1600Gbps, OSFP, 2xLC-LC, 1310nm SMF, 2xFR4 Twin-port Transceiver.
Is MMS4A20-XM800 an Ethernet optic?
Applicable catalog candidates: 980-9IAT0-00XM00.
The exact current release rows identify XDR and Ethernet NA. This package makes an XDR InfiniBand claim only.
Public references: Validated and Supported Cables and Switches | ConnectX-8 Firmware RN, Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
What is the electrical and optical configuration?
Applicable catalog candidates: 980-9IAT0-00XM00.
It is a single-port 800G DR4 optic with four 200G-PAM4 lanes and one MPO-12/APC optical connector.
Which host applications are documented?
Applicable catalog candidates: 980-9IAT0-00XM00.
NVIDIA names ConnectX-8 PCIe and mezzanine applications linking to Quantum-X800 QM3x00 switch-side twin-port optics, with RHS cooling at the server side.
Public references: NVIDIA MMS4A20 800Gbps, DR4 Single-port OSFP, MPO, 1310nm Single Mode, RHS Transceiver | NVIDIA MMS4A20 800Gbps, DR4 Single-port OSFP, MPO, 1310nm Single Mode, RHS (500m) Transceiver, Overview | NVIDIA MMS4A20 800Gbps, DR4 Single-port OSFP, MPO, 1310nm Single Mode, RHS (500m) Transceiver.
Is XDR400 the same as NDR400?
Applicable catalog candidates: 980-9IAT0-00XM00.
No. NVIDIA describes XDR400 as two 200G-PAM4 lanes; NDR400 uses four 100G-PAM4 lanes. Equal total rate does not establish optical interoperability.
Public references: Overview | NVIDIA MMS4A20 800Gbps, DR4 Single-port OSFP, MPO, 1310nm Single Mode, RHS (500m) Transceiver.
Does an XDR optic automatically downshift to NDR?
Applicable catalog candidates: 980-9IAT0-00XM00, 980-9IAY0-00XM00.
No. NVIDIA places generation compatibility at the switch or adapter; an XDR optic does not independently downshift to 100G-PAM4.
Public references: Optical Transceivers and Cables for AI Networking | NVIDIA.
Is this single-port or twin-port?
Applicable catalog candidates: 980-9IAY0-00XM00.
The exact ordering table and product body identify one 800G DR4 port with one MPO-12/APC connector. The twin-port wording in the page title is inconsistent and is not used.
Public references: NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single Mode Transceiver (up to 500m) | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver, Ordering Information | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver.
Which protocols and application are named?
Applicable catalog candidates: 980-9IAY0-00XM00.
The live body supports XDR InfiniBand and 800GbE and names ConnectX-9 server use. The exact release row remains Prototype.
Public references: NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single Mode Transceiver (up to 500m) | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver, Validated and Supported Cables and Switches | ConnectX-9 Firmware RN.
What is the current published power limit?
Applicable catalog candidates: 980-9IAY0-00XM00.
Both live October 6 product content and specifications say 16 W maximum. Earlier cached 15 W text is not used.
Public references: NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single Mode Transceiver (up to 500m) | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver, Specifications | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver.
Can a definitive case-temperature range be published?
Applicable catalog candidates: 980-9IAY0-00XM00.
Not yet. The feature list says 20–70°C while the specification table says 20–64°C. Obtain NVIDIA clarification for the exact hardware revision.
Public references: NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single Mode Transceiver (up to 500m) | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver, Specifications | NVIDIA MMS4C10-XM800 800Gbps, 2xDR4, Twin-port OSFP, 2xMPO (APC), 1310nm Single-mode Transceiver.
Availability is on request. Sales provides the USD quotation after the exact configuration is confirmed. No stock, condition or delivery promise is made here.
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