USFP is an ultra-dense small form factor pluggable announced at the Open Compute Project global summit. It targets 12.8 Tbps of Ethernet bandwidth in a package roughly the size of existing OSFP modules.

That figure sits beyond the 1.6 Tbps cap for the most sophisticated pluggable optics today.

The hard part is not lane count. A 100-watt module in an OSFP-sized cage concentrates 12.8 Tbps into one replaceable part, so a single laser or DSP fault can remove far more traffic than a single GPU link.

Cisco says USFP modules use a two-phase insertion mechanism, first seating the pluggable in the cage and then actuating a second mechanism to make the electrical connection.

The open standard lowers buyer lock-in, but the document does not prove yield at that density. It also does not show that switch vendors will route 204.8 Tbps through 16 ports instead of co-packaged optics.

No measured power draw, release date, SKU, picture, or named switch or NIC deployment is given. The 30 percent switch-side savings from co-packaged optics remains a planning figure, not a USFP measurement.

The 100-watt budget is the fab test, and the open standard lowers buyer lock-in.