NVIDIA/Mellanox MMA4Z00-NS Compatible 800GBASE-SR8 (2xSR4) Twin-port OSFP IHS/Closed Finned Top PAM4 850nm 50m Dual MPO-12/APC DDM MMF InfiniBand NDR Optical Transceiver Module

Arrived a bit later than expected, ngl. But once they showed up? Solid modules. Zero link drops. Would've been 5 stars if they'd gotten here sooner.

At this point, buying from QSFPTEK feels a little like ordering from a supplier you already know. No surprises, no unnecessary drama. The packaging was neat, the modules felt solid, and every unit worked out of the box. After dealing with networking equipment for years, I've learned that reliability is worth more than marketing claims.

This closed finned version was recommended to us by Talia for a rack with less-than-ideal airflow. Been running nonstop for a couple weeks now and no overheating alarms or random disconnects.

This wasn’t originally the brand we planned to buy, but lead times from another supplier were getting ridiculous. Ended up trying the QSFPTEK version instead and honestly no regrets so far. Arrived in about 4 days, packed well, and all units passed testing on the first try.

Packaging was professional and every module arrived with clean connectors and clear labeling.

We were setting up a new AI training cluster and needed a bunch of 800G SR8 modules to interconnect our compute nodes. My colleague who’s been building data centers for over a decade told me about QSFPTEK—he said their transceivers always play nice with NVIDIA gear and cost way less than the name‑brand stuff. Took a chance with this MMA4Z00‑NS, and honestly? Plugged it in, link came up instantly, 800G throughput no problem. The build quality feels solid too—metal housing, good shielding. For the price? Absolute steal. We’re standardizing on QSFPTEK for future builds now.

Great product, connected with no problems. Would purchase again if needed。

Plug-and-play was smooth, module was recognized immediately, and setup on Quantum-2 switches took just minutes. No extra tuning needed.

The 800G SR8 module worked perfectly for short-range InfiniBand connections within our GPU cluster. It plugged in and was recognized instantly with no firmware drama.

Got tasked with upgrading our lab's air-cooled Quantum‑2 switch to 800G without breaking the bank. My colleague who runs another data center told me about QSFPTEK. He said their compatibles have been solid for him for over a year. So I grabbed these MMA4Z00-NS finned top modules. Plugged them into the OSFP ports on our Spectrum‑4 Ethernet switch, connected two MPO‑12 cables to our ConnectX‑7 adapters, and boom—800GBASE‑SR8 lit up instantly. The modules run cool, the finned heatsink design actually works. For the price, this is a no‑brainer. Will definitely be back for more as we scale out the rest of the racks.