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OPTICAL TRANSCEIVER
NVIDIA MMS4A20-XM800
- Connector
- OSFP electrical; single MPO-12/APC optical
- Media
- single-mode fiber, 9 µm core
- Power
- 18 W maximum; 2 W low-power mode
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.
| Media | single-mode fiber, 9 µm core |
|---|---|
| Power | 18 W maximum; 2 W low-power mode |
| Connectors | OSFP electrical; single MPO-12/APC optical |
| Part Number | MMS4A20-XM800 |
| Branch count | 1 |
| Lane mapping | 4 x 200G-PAM4 electrical and optical |
| Wavelength nm | 1310 |
| Thermal profile | RHS |
| Interconnect type | optical_transceiver_FRO |
| Branch data rate (Gb/s) | 800 |
| Aggregate data rate (Gb/s) | 800 |
| Case temperature (degrees C) | 0 to 70 |
| Manufacturer lifecycle phase | P-Rel |
| Maximum optical or copper line reach (m) | 500 |
Product questions & answers
Is MMS4A20-XM800 an Ethernet optic?
The exact current release rows identify XDR and Ethernet NA. This package makes an XDR InfiniBand claim only.
What is the electrical and optical configuration?
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?
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.
Is XDR400 the same as NDR400?
No. NVIDIA describes XDR400 as two 200G-PAM4 lanes; NDR400 uses four 100G-PAM4 lanes. Equal total rate does not establish optical interoperability.
Can DR4 and FR4 be directly linked?
No. DR4 uses parallel optical channels; FR4 multiplexes wavelengths onto a fiber pair. Match the optical format at both ends.
Is it safe to look into a connected optical port?
No. Never look directly into an energized optical port or connected fiber; its infrared light can be invisible.
What distinguishes XDR signaling from NDR?
XDR uses 200G-PAM4 signaling; NDR uses 100G-PAM4. Equal aggregate bandwidth alone does not establish interoperability.
Does an XDR optic automatically downshift to NDR?
No. NVIDIA places generation compatibility at the switch or adapter; an XDR optic does not independently downshift to 100G-PAM4.