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MMA1U00-FS: NVIDIA Mellanox 400GbE QSFP-DD SR8 Optical Transceiver

NVIDIA MMA1U00-FS Transceiver400GbEQSFP-DD
NVIDIATransceivers

Also listed as: MMS1U00-FS, MMA1U00-FS400

The NVIDIA MMA1U00-FS is a 400GBASE-SR8 QSFP-DD optical transceiver module providing 400 Gigabit Ethernet connectivity up to 100 meters over OM4 multimode fibre for Spectrum-3 switches.

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Specifications

Part numberMMA1U00-FS
BrandNVIDIA
TypeTransceivers
Other numbersMMS1U00-FS, MMA1U00-FS400
Statuscurrent
Form factorQSFP-DD
Speed400GbE
Wavelength nm850
ConnectorMPO-16
Cable typeMultimode Fibre
Max distance m100

About the MMA1U00-FS

The NVIDIA MMA1U00-FS optical transceiver delivers ultra high density 400 Gigabit Ethernet connectivity for modern AI computing clusters and cloud data center spine leaf fabrics. Operating over eight parallel optical lanes at 850 nanometers on multimode fibre using PAM4 signaling, it provides massive aggregate throughput with low latency.

Compatibility

Compatible with NVIDIA Spectrum-3 SN4600 and SN4700 Series switches equipped with QSFP-DD ports. It supports links to high speed AI compute servers equipped with ConnectX-6 Dx and ConnectX-7 network adapters running under Cumulus Linux or SONiC operating systems.

How to identify a genuine unit

Enclosed in a QSFP-DD metallic shell with dual rows of electrical contacts and a heavy duty beige or black pull tab release handle. The product label states NVIDIA branding, part number MMA1U00-FS, manufacturing serial number, and optical laser safety markers.

Buying used

Inspect the 16-fiber MPO ferrule interface under high magnification to confirm that none of the optical channels are scratched or obstructed by dust. Test on an active Spectrum-3 switch port to verify that RS-FEC locks across all eight PAM4 lanes without error frame accumulation.

Fits these models

Works together

How the NVIDIA MMA1U00-FS connects to servers, storage and the network: 3 ways, with the hardware on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server

Switches

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Switches

Storage

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Switches

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with NVIDIA

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that NVIDIA has tested with the NVIDIA MMA1U00-FS.

FAQ

What optical connector is used on the MMA1U00-FS transceiver?

It uses an industry standard 16-fiber female MPO/MTP APC optical connector interface.

Does this transceiver use PAM4 modulation?

Yes, it utilizes eight parallel 50Gbps PAM4 optical channels to achieve 400Gbps aggregate rate.

Buying or selling MMA1U00-FS?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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Sources