PC Building Sim 2: Best config.json for Benchmarking

The primary goal for PCBS2 benchmarking optimization is Asset Stream Prioritization. The game’s 3DMark simulation is not a real-time render of your build; it is a calculation based on a weighted formula ($Score = 1 / (0.85/S_{graphics} + 0.15/S_{cpu})$). However, the game still renders the benchmark window. This configuration focuses on lowering the “background” rendering load so your CPU can finish the score calculations faster.

File Path

Unlike the first game which used the Windows Registry, PCBS2 (an Epic Games exclusive) stores its configuration in a JSON format:

%LocalAppData%\PCBS2\Saved\Config\WindowsNoEditor\GameUserSettings.ini

(Note: Some advanced physics and part-loading variables are in %LocalAppData%\PCBS2\Settings.json)

Technical Configuration (The 2026 “Power-User” Template)

Paste or modify these values in your configuration files to ensure the benchmark logic is never interrupted by graphics stutter:

{
  "benchmarking": {
    "skipDemo": true,
    "accuratePhysics": false,
    "backgroundStreaming": true,
    "maxCalculationThreads": 8
  },
  "graphics": {
    "textureQuality": 2,
    "shadowQuality": 0,
    "postProcessing": 0,
    "antiAliasing": 0,
    "foliageQuality": 0
  }
}

Parameter Breakdown:

• skipDemo=true: This is the most vital setting for benchmarking. It forces the 3DMark app in-game to skip the “Cinematic” portion and go straight to the data crunching, saving you roughly 30–60 seconds per test.
• maxCalculationThreads=8: (Match your real CPU’s physical core count). This ensures the game uses multiple threads to calculate the complex interactions between high-speed RAM timings and GPU clock offsets.
• accuratePhysics=false: This refers to the cable and fluid physics inside the case. Turning this off during a benchmark prevents the CPU from wasting cycles on “cable wiggle” while it should be calculating the 3DMark score.
• backgroundStreaming=true: Allows the game to load the next set of “Parts” (for your next build) while the current benchmark is running.

Strategy for 2026 Score Maximization

• The “Dual-GPU” 85% Rule: In the PCBS2 engine, the GPU accounts for roughly 85% of the 3DMark score. If you are struggling to hit a client’s target, always prioritize a second GPU (SLI/NVLink) over a faster CPU.
• RAM Channeling: Always use 2 or 4 sticks of RAM. The game simulates “Dual Channel” and “Quad Channel” bandwidth; using a single 32GB stick will result in a significantly lower score than 2x16GB sticks.
• XMP is Mandatory: By default, every PC you build in PCBS2 has XMP/DOCP OFF. You must enter the BIOS for every benchmark build and turn it on, or you will lose approximately 5% of your potential score.
• Thermal Throttling: If your benchmark score is lower than the “Part Ranker” suggests, check your thermal paste. In 2026, PCBS2 has a more sensitive thermal model; if the CPU hits 95°C during the test, the simulation will “throttle” the score.

Key Performance Parameters

Parameter	Recommended Value	Impact
XMP / DOCP	Enabled (BIOS)	+5% Total Score.
Dual Channel	2/4 Sticks	Higher CPU/Memory Score.
GPU Overclock	+100 – 200 MHz	Significant 3DMark gain.
Skip Demo	Enabled (Config)	Faster real-world testing time.

Frequently Asked Questions (FAQ)

Conclusion and Expected Results

By enabling skipDemo and optimizing maxCalculationThreads in your configuration, you are streamlining the “Career Mode” grind. You can expect benchmarks to complete 50% faster, zero UI lag when scrolling through the Part Ranker, and more consistent 3DMark results that closely match your overclocking targets.