800G Optical Transceivers: OSFP and QSFP-DD

Use this series page to compare form factors, link reaches and interface directions before selecting a specific model. Final specifications, compatibility coding and delivery options remain tied to the ordered P/N and target host.

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Key specifications

Typical reach

100m / 500m / 2km

800G OSFP DR8 800G OSFP 2xFR4 800G QSFP-DD 2xFR4 800G OSFP VR8 800G OSFP SR8 800G QSFP-DD DR8 800G OSFP DAC 800G QSFP-DD DAC 800G OSFP to 2x400G OSFP Breakout DAC

Applications

AI fabricGPU cluster interconnectData-center Spine800G breakout planning

Related applications and solutions

AI compute interconnects → Plan 400G/800G ports, thermals, and breakout links 800G SR8 vs VR8 vs DR8 vs 2xFR4 → Compare 50m, 100m, 500m and 2km PMD directions Optical link budget calculation → Separate path loss, margin, sensitivity and overload Optical transceiver procurement checklist → Prepare host, sample and batch-acceptance fields Optical transceiver link troubleshooting → Diagnose link-down, FEC errors, flap, and breakout failures High-speed optical interconnect → Move from port inventory to sample and production validation

Frequently asked questions

Should I choose OSFP or QSFP-DD for 800G?

The switch, NIC or accelerator decides it, not the optics. The two cages are not interchangeable, so confirm which one the target port provides before selecting a PMD. OSFP has more thermal headroom in dense front panels, while QSFP-DD is often chosen for backward compatibility with an existing QSFP installed base.

Can an 800G port break out to 2x400G or 8x100G?

Only when the host port is configured for that mode and every branch port accepts the resulting rate. Breakout is a host configuration plus a matching cable or trunk, not a property of the module alone. Confirm the supported lane modes on the target platform before planning the fan-out.

Which 800G PMD covers my link distance?

Roughly: multimode VR8 and SR8 for in-row runs around 100m, DR8 over parallel single-mode for 500m, and 2xFR4 over duplex single-mode for 2km. The listed reaches are 100m, 500m and 2km, but the installed fiber type and connector - MPO-16, duplex LC or dual CS - usually narrows the choice before distance does.