UNLOCK // PDA CASE FILE
Can't Unlock the Parallel Processing Unit in Below Zero
The Parallel Processing Unit is a three-fragment Mercury II component used for the Test Override Module. It is a story-linked scan, not a random Fabricator discovery.
LAST CHECK
ANSWER LOCK // QUICK RESPONSE
Scan three Parallel Processing Unit fragments in the Mercury II wreck, then craft the component at the Fabricator with one Gold, one Silver Ore, and one Table Coral Sample. Use it to make the Test Override Module for the Delta Island communications tower.
SIGNAL CONFIRMEDBLUEPRINT DIAGNOSTIC // WHY IT ISN'T UNLOCKING
The blueprint is tied to three Parallel Processing Unit fragments in Mercury II. Even after the blueprint completes, the crafted component will not appear until the Gold, Silver Ore, and Table Coral Sample are available at the Fabricator.
UNLOCK CHECKLIST
- Reach and search the Mercury II wreck
- Scan three Parallel Processing Unit fragments
- Gather one Gold, one Silver Ore, and one Table Coral Sample
- Craft the component at the Fabricator
BRING THIS
- Scanner
- Fabricator
- Oxygen and power reserve for the Mercury II dive
- Table Coral Sample, Gold, and Silver Ore
DATA ACCESS LEVEL
Reveal only as much as you need
COMMON REASONS YOU ARE STUCK
- Searching the Mercury II for a single finished item
- Stopping after one or two fragment scans
- Confusing this component with the Test Override Module
- Using original Subnautica resource routes for Gold or Silver
- Leaving without the Table Coral Sample needed for the recipe
EVIDENCE LOG
Verification record
Facts on this page are separated from player speculation. Version-sensitive answers should be rechecked after an official update.
LAST CHECK2026-09-01
- SOURCE // 01Parallel Processing Unit (Below Zero) OPEN SOURCE ↗WIKI · checked 2026-09-01
- SOURCE // 02Mercury II OPEN SOURCE ↗WIKI · checked 2026-09-01
- SOURCE // 03Test Override Module OPEN SOURCE ↗WIKI · checked 2026-09-01