Parallel Processing Unit

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The Parallel Processing Unit is an electronic item that is used to craft the Test Override Module. Its only use is to craft the Test Override Module to deactivate the signal tower on Delta Island which is required to progress with the story.

Recipe

The blueprint for this item is unlocked by scanning fragments in the Mercury II. It is crafted in the Fabricator.

The Parallel Processing Unit was orignally called the Purple Vents Salvage and the Ship Wreck Salvage and was found exclusively in the Mercury II‘s Detached Thruster and its Rear portion respectively.
- Additonally, these salvages were originally designed to repair the Alterra Communications Tower to reestablish communications with the Vesper Station.
- Finally, the Purple Vents Salvage was cut and replaced with an Advanced Wiring Kit to repair the communications tower before the Ship Wreck Salvage was also cut and both were replaced with the Parallel Processing Unit.

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Items in Subnautica Below Zero

Crafted Resources

Basic Materials	Enameled Glass • Fiber Mesh • Glass • Lubricant • Plasteel Ingot • Silicone Rubber • Titanium • Titanium Ingot

Advanced Materials	Aerogel • Antidote • Benzene • Hydraulic Fluid • Hydrochloric Acid • Polyaniline • Synthetic Fibers

Electronics	Advanced Wiring Kit • Battery • Computer Chip • Copper Wire • Ion Battery • Ion Power Cell • Parallel Processing Unit • Power Cell • Reactor Rod • Test Override Module • Wiring Kit

Drinkable	Disinfected Water • Filtered Water • Large Filtered Water • Reclaimed Water • Thermos • Water Purification Tablet

Fish	Arctic Peeper • Arrow Ray • Bladderfish • Boomerang • Discus Fish • Feather Fish • Feather Fish (Red) • Hoopfish • Noot Fish • Spinefish • Spinner Fish • Symbiote • Triops

Raw	Antennae Fruit • Chinese Potato • Creepvine Sample • Creepvine Seed Cluster • Fevered Pepper • Gel Sack • Lantern Fruit • Marblemelon • Preston's Delight • Shrub Nut

Processed	Nutrient Block • Snacks • Spicy Fruit Salad

Personal

Equipment	Booster Tank • Cold Suit • Compass • Fins • First Aid Kit • Headlamp • High Capacity O₂ Tank • Pipes • Rebreather • Reinforced Dive Suit • Scanner Room HUD Chip • Standard O₂ Tank • Stillsuit • Swim Charge Fins • Thermos • Ultra High Capacity Tank

Tools	Air Bladder • Flare • Flashlight • Habitat Builder • Laser Cutter • Light Stick • Mineral Detector • Pathfinder Tool • Propulsion Cannon • Repair Tool • Scanner • Survival Knife • Tether Tool • Thermoblade • Thumper

Upgrade Modules

Prawn Suit	Gas Torpedo • Prawn Suit Depth Module MK1 • Prawn Suit Depth Module MK2 • Prawn Suit Drill Arm • Prawn Suit Grappling Arm • Prawn Suit Jump Jet Upgrade • Prawn Suit Propulsion Cannon • Prawn Suit Thermal Reactor • Prawn Suit Torpedo Arm • Storage Module • Vortex Torpedo

Scanner Room	Camera Drone • Scanner Room Range Upgrade • Scanner Room Speed Upgrade • Scanner Room HUD Chip

Seatruck	Seatruck Afterburner Upgrade • Seatruck Depth Upgrade MK1 • Seatruck Depth Upgrade MK2 • Seatruck Depth Upgrade MK3 • Seatruck Horsepower Upgrade • Seatruck Perimeter Defense Upgrade