The 800G OSFP 2xSR4 (SR8) Finned Top is a high-density pluggable optical transceiver engineered for the next generation of AI and High-Performance Computing (HPC) fabrics. Optimized for NVIDIA Quantum-2 InfiniBand and high-radix Ethernet switches, this module delivers 800Gbps aggregate bandwidth using 8 lanes of 112G PAM4 signaling. Featuring a Twin-port OSFP Finned Top form factor for advanced thermal management in air-cooled environments, it supports link distances up to 100m over OM4 multimode fiber via Dual MPO-12/APC interfaces. Compliant with IEEE 802.3ck and OSFP MSA standards, it integrates real-time DDM diagnostics to ensure peak reliability in mission-critical GPU clusters.
Below solution is based on an 800Gbps speed, paired with OSFP SR8 800G fiber transceiver, and connected via MTP|MPO cable. It is compatible with devices such as NVIDIA Spectrum-4 switches, easily achieving high speed data interoperability at the 800G level.
Meanwhile, OSFP SR8 800G fiber optic transceiver can be used for flexible interoperability between 800G and 400G Ethernet. As shown in the picture below, using the OSFP SR8 800G fiber optic transceiver and connecting two 400G optical transceiver via MTP|MPO fiber cable, data transmission from 400G to 800G can be achieved. This is a highly adaptable high speed connection solution for network upgrades and application such as data centers.
Beyond simple speed upgrades, 800G technology is a catalyst for future network innovations, enabling the massive I/O throughput required by emerging Large Language Models (LLM).
Finned Top 800G transceiver tailored for Ethernet air-cooled switches, features integrated finned heat sinks for efficient passive cooling (reducing junction temperature by 5-10°C vs flat-top modules). Fully tested for mainstream switches (e.g., NVIDIA Spectrum series) with plug and play compatibility, 800G transceiver supports 800G PAM4 transmission, suits data centers and AI clusters, reduces room energy consumption, and solves core heat dissipation/compatibility pain points for efficient, stable high speed networks.
UnitekFiber's OSFP SR8 800G optical transceivers undergo rigorous testing on original NVIDIA devices to ensure perfect product performance and reliability. Tests cover both hardware compatibility, including plugging, unplugging and rebooting procedures, and software compatibility, encompassing connectivity stability and parameter configuration accuracy. Every unit is quality tested for 100% compatibility in the targeted switch environment, which guarantees flawless operations.
The 800G OSFP 2xSR4 is the fundamental building block for Generative AI Training, GPU-to-GPU Clustering, and InfiniBand Networking. It is engineered to handle the intense East-West traffic demands of modern hyperscale data centers.
1. InfiniBand Quantum-2 Interconnects Purpose-built for low-latency, zero-packet-loss connectivity in InfiniBand fabrics.
2. GPU Node Expansion Seamlessly connects H100/H200 GPU nodes to the leaf switch layer at 800Gbps. As GPU clusters expand, selecting specialized 800G AI infrastructure connectivity solutions has become critical for maintaining zero-packet-loss fabrics in modern high-performance computing environments.
3. HPC Spine-Leaf Architectures Provides the density and thermal reliability required for massive compute clusters.
Explore our
Deploying 800G requires a deep understanding of PAM4 signal integrity and thermal budgets. UnitekFiber offers comprehensive interoperability testing and custom coding for Arista, Cisco, and NVIDIA-Mellanox hardware. We help you design a connectivity blueprint that eliminates downtime and maximizes throughput.
Planning an 800G AI cluster deployment? Our engineering team can provide validated cabling and transceiver combinations tailored to your rack density.
To optimize your CapEx and OpEx, our engineering team provides a technical guide on choosing the right 800G optics based on reach, power budget, and cooling requirements.
"2*SR4" refers to two independent 4 channels for short range, while "SR8" denotes a single 8 channel for short range. This dual-mode capability allows flexible deployment in different 800G Ethernet architectures, adapting to various link requirements.
Yes, it is explicitly designed to be NVIDIA compatible.
The 800G transceiver operates at a wavelength of 850nm, which is optimized for short reach optical communication over multi-mode fiber (MMF).
It supports a maximum transmission distance of 50 meters when used with compatible multi-mode fiber (MMF), making it suitable for short-reach data center applications.
DOM (Digital Optical Monitoring) allows real-time monitoring of key parameters such as optical power, temperature, and voltage. Yes, this transceiver is equipped with a DOM function for enhanced network visibility and maintenance.
Finned Top modules have an integrated heat sink that sticks out. They are designed for "Finned-compatible" cages typically found in AI switches. Always check your switch's mechanical specifications before choosing between Finned and Flat top.
It allows for a clean 1-to-2 breakout into two 400G links using standard MPO-12 cables. The APC polish reduces return loss, which is critical for the sensitivity of 112G PAM4 signaling.
The 850nm wavelength works perfectly with our multimode fiber infrastructure, and the 50m range is more than enough for our facility. The DOM feature is a big plus for troubleshooting.
I’ve installed this transceiver in several client data centers, and it’s consistently reliable. The plug and play compatibility with NVIDIA devices saves a lot of setup time, no need for custom drivers.
The finned top design is a smart addition, as 800G transceivers can run hot, and this one stays cool even in dense rack environments. Clients have been happy with the performance and ease of use.
It works perfectly with our NVIDIA compatible switches, and the 50m reach covers our entire facility. The installation was straightforward, even for our small IT team, and the DOM function helps us keep an eye on performance without extra tools. A solid choice for SMBs looking to scale their network.
We use this transceiver in our edge data centers for short-reach 800G connections. The dual 12cores MPO/APC connectors provide excellent signal quality, and the PAM4 modulation ensures efficient use of bandwidth.
+86-755-21034367
