OSFP800G·since 2022 (OSFP MSA 5.0), 2024 (IEEE 802.3df 800G)

OSFP, The 800G workhorse, eight lanes of 100G PAM4 for AI/ML and hyperscale.

Octal Small Form-factor Pluggable, OSFP MSA. The primary 800G transceiver form factor, eight electrical lanes at 100G PAM4 each. Physically wider than QSFP-DD; not mechanically interchangeable. Used in AI/ML training clusters (NVIDIA Quantum-2 InfiniBand, Spectrum-X Ethernet), hyperscale spines, and 800G coherent DCI. CMIS 5.x management.

Specifications

MSA references

OSFP MSA rev 5.x (mechanical) · CMIS 5.0 / 5.1 (management) · IEEE 802.3df / 802.3dj (800G PHY)

Electrical interface

8 lanes × 53.125 Gbaud PAM4 (100G per lane)

Power consumption

15 W – 20 W typical; up to 23 W for coherent ZR variants

Signalling

PAM4 with KP4 / RS-FEC

FEC

RS-FEC (544,514) required; coherent ZR uses OpenZR+ MSA FEC layer

Connector types

MPO-12 (DR8 breakout to MPO-16) · MPO-16 (SR8, DR8) · LC duplex (LR8, ER8, ZR)

Available SKUs

Part number	Spec	Wavelength	Fiber	Reach	Notes
`NAP-OSFP-SR8`	800GBASE-SR8	850 nm	MM OM4 / OM5	100 m (OM4) / 150 m (OM5)	MPO-16, 8 parallel
`NAP-OSFP-DR8`	800GBASE-DR8	1310 nm	SM parallel	500 m	MPO-16
`NAP-OSFP-LR8`	800GBASE-LR8	LAN-WDM 8λ	SM	10 km	LC duplex
`NAP-OSFP-ER8`	800GBASE-ER8	LAN-WDM 8λ	SM	40 km	Extended reach single-mode
`NAP-OSFP-800ZR`	800G coherent ZR	C-band	SM	80–120 km	DSP-based, no amplifier
`NAP-OSFP-800ZR-PLUS`	800G ZR+ (OpenZR+)	C-band	SM	500 km+ with amps	Carrier-grade DCI
`NAP-OSFP-DAC-1M…2M`	800G DAC	—	Twinax	1–2 m	Passive intra-rack
`NAP-OSFP-AOC-3M…30M`	800G AOC	850 nm	—	3–30 m	Dominant in AI clusters
`NAP-OSFP-BREAKOUT`	800G → 2×400G DR4	1310 nm	SM parallel	500 m	Standard fabric breakout

In production with

OSFP modules are deployed across these platforms today. Full coding details are on the compatibility matrix.

NVIDIA Quantum-2 InfiniBand (NDR 400G / NDR 800G)
NVIDIA Spectrum-4 SN5000 series
Arista 7060X6, 7800R3 800G line cards
Cisco Silicon One 800G platforms
Juniper PTX10000 series
Hyperscale custom silicon (Meta, Google, ByteDance)

Operational notes

OSFP is not backward-compatible with QSFP-DD, different mechanical envelope. Some 800G platforms use QSFP-DD800 instead; verify your switch chassis.

OSFP modules can draw 15–20 W; coherent ZR up to 23 W. Switch per-cage power and chassis thermal budget are real constraints, verify the platform datasheet.

800G ZR coherent modules implement OpenZR+ MSA or 800ZR standards. Per-lane BER and pre-FEC error counters are exposed through CMIS for telemetry pipelines.

AI/ML training clusters increasingly bias toward AOC and DR8 at 800G, link reach within a row, low BER, predictable latency.

Recommended for

NVIDIA Quantum-2 / Spectrum-X AI training fabric
Hyperscale 800G spines (Meta, Google, ByteDance-class)
Disaggregated NVMe-oF storage at 800G
Long-haul DCI with coherent 800ZR / ZR+

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