As data workloads explode in artificial intelligence (AI), machine learning (ML), and high-performance computing (HPC), the demand for ultra-high bandwidth and low-latency connectivity is higher than ever. Enter the 800G OSFP 2×FR4 transceiver—a powerful solution designed for the latest generation of leaf-spine network architectures and AI cluster interconnects.
1. Technical Overview: What Is 800G OSFP 2×FR4?
The 800G OSFP 2×FR4 is a hot-pluggable optical transceiver that delivers up to 800Gbps of data over single-mode fiber (SMF) using two independent 400G FR4 channels. It adopts PAM4 modulation, supports 8x100G lanes in the electrical domain, and uses 2x400G duplex LC optical connectors in the optical domain.
Key Specifications:
| Parameter | Description |
| Form Factor | OSFP (Octal Small Form-Factor Pluggable) |
| Max Data Rate | 800Gbps total (2×400G) |
| Electrical Interface | 8×100G PAM4 |
| Optical Interface | 2×400G FR4 (2 LC duplex connectors) |
| Wavelength | 4× CWDM wavelengths per 400G FR4 |
| Transmission Distance | Up to 2 km (per channel) |
| Power Consumption | ≤ 16W typical |
| FEC Requirement | RS-FEC (KP4) on host side |
| Compliance | IEEE 802.3cu, CMIS 5.2, OSFP MSA |
Why 2×FR4 Design?
Instead of using a single 800G channel, the 2×FR4 module splits the transmission into two separate 400G channels (each FR4). This offers:
- Backward compatibility with 400G optics
- Flexible deployment for aggregation or breakout scenarios
- Cost-effective solution for intermediate upgrades before full 800G adoption
2.Application Scenarios
1. Spine–Leaf Architecture in Hyperscale Data Centers
In modern hyperscale environments, 800G OSFP 2×FR4 modules are widely used in:
- Leaf switches to spine switches
- Spine to core router interconnects
- High-bandwidth aggregation points
- Reducing cabling density vs. dual 400G deployments
2. AI Clusters & GPU-to-GPU Connectivity
High-performance computing and AI/ML training rely on massive data exchange between nodes. This transceiver is ideal for:
- NVIDIA HGX & DGX platforms
- GPU-to-switch or switch-to-switch connections
- Ethernet-based AI fabrics with low-latency and high-throughput demands
3. Carrier Networks & Metro Aggregation
Its 2 km reach and compact OSFP footprint make it suitable for metro edge or 5G backhaul deployments where density + performance matter.
Conclusion: Future-Ready with 800G
As the network transitions from 400G to 800G, the OSFP 2×FR4 module is a cost-effective and high-performance bridge to next-gen infrastructure.
Whether you’re scaling your AI network, building a cloud backbone, or upgrading your DC core, Optech’s 800G OSFP 2×FR4 delivers the flexibility and power your infrastructure demands.
About Optech Technology Co. Ltd
Optech Technology Co. Ltd was founded in 2001 in Taipei, Taiwan. The company was created with a sole purpose, to provide a wide and high quality portfolio of optical products to a very demanding and fast evolving market.
To respond to the permanent increase of IP traffic, Optech portfolio is constantly growing. Since the beginning, the company has always been up to date with the latest innovations on the market. Today, we are proud to deliver a large selection of 25G SFP28, 40G QSFP+, 100G QSFP28, 200G QSFP56, 400G QSFP-DD, 800G QSFP-DD and OSFP optical transceivers and cables.
Optech has a large portfolio of products which include optical transceivers, direct attach cables, active optical cables, loopback transceivers, media converters and fiber patch cords.
Through its large selection of optical products, that have a range of data speed from 155 Mbps to 800 Gbps and reach distances up to 120km, Optech products are suitable for various industries such as telecom, data centers as well as public and private networks.
| Part Number | Optech Part Number | Features | Note |
| 800G OSFP 2×FR4 | OPOM-S02-13-CB2 | 800Gb/s OSFP 2xFR4 single mode mode, LC, 1310nm, up to 2km | Compatible with NVIDIA MMS4X50-NM |
Nvida MMS4X50-NM Compatible
Optech’s 800G OSFP 2xFR4 transceiver is fully compatible with Nvidia devices. The OSFP-800G-2FR4 Nvidia MMS4X50-NM compatible was tested on Nvidia QM9790 switch.
The OSFP-800G-2FR4 Nvidia MMS4X50-NM compatible was aslo tested on Nvidia Ethernet Spectrum-4 SN5600 switch.
To ensure the compliance and the performance of our transceivers, all our products are carefully verified in our testing lab.
To see the complete Nvidia compatible list, click here.
For additional information about 800G OSFP 2×FR4 transceivers, price inquiry, or custom OEM solutions, please contact us at sales@optech.com.tw
