How to find the Parallel Processing Unit Once you have the Laser Cutter, you are ready to begin collecting fragments of the Parallel Processing Unit.

The fragments for the Parallel Processing Unit blueprints in Subnautica can be found by searching through the wreckage of the Mercury II spacecraft.

The Parallel Processing Unit has three fragments. Once the blueprint is obtained, one Gold, one Silver Ore, and one Table Coral Sample are required to craft it in the Fabricator.