NVIDIA USFP, a new pluggable optics form factor developed with Cisco, is built to carry 400Gb/s on every electrical lane. The Ultra-Dense Small Form Factor Pluggable module remains a plan rather than a shipping part, and NVIDIA describes the first USFP transceivers as 16 full-duplex lanes inside a footprint the size of today's octal small form factor (OSFP) module.
The target is the point where a switch runs out of bandwidth. Once that happens, operators typically add another network tier, which means more optical links, more latency and more power spent moving data instead of computing on it. NVIDIA says USFP offers four times the bandwidth density and roughly 1.3 times the power efficiency of 200Gb/s-per-lane pluggables, so the same rack space could connect more 1.6Tb/s endpoints without a further tier.
The headline capacity figure needs careful reading. NVIDIA cites up to 12.8Tb/s, while Cisco's Bill Gartner and Will Eatherton write that the 16-lane module delivers 6.4T of aggregate capacity, with 12.8T reached only at 32 lanes. Both companies treat the 32-lane version as a later expansion of the design, not part of the first modules.
Most of the engineering sits in the connector. NVIDIA USFP uses a two-dimensional array connector with a two-step insertion, so the high-speed contacts engage only after the module is seated. NVIDIA says that reduces contact wear and makes insertion force more predictable. The design also supports up to 100 watts of dissipation without a separate cooling circuit inside the transceiver, which keeps switch designs simpler. Because the connector is rated for 400Gb/s, it also improves signal quality when the module runs at 200Gb/s per lane, giving buyers a bridge from current silicon.
NVIDIA and Cisco are working with TE Connectivity and Amphenol on cages, connectors and modules, and they expect more partners to join. They also plan an open specification through a community-led multi-source agreement. Neither company gave a price, a shipping date or the optical reach of the first modules. Cisco frames USFP as one path among several, noting that near-packaged and co-packaged optics are also being pursued, and argues that field-replaceable modules and mature supply chains keep pluggables attractive.
That multi-source agreement matters more than any single spec. If suppliers beyond the four named companies sign on, USFP could become a shared format that switch makers can plan around; if not, it stays a two-vendor design in a market that has historically preferred interchangeable parts.
