Industrial PC Testing and Ageing Process

Why Every IPC Order Takes Minimum One Week

At Thinvent, we are manufacturers, not traders. We build every industrial PC to order, according to customer requirements. We do not stock finished devices; we build each unit specifically for your order. With this approach and our rigorous quality assurance process, every IPC order requires a minimum processing time of one week.

The one week is just the testing time. Assembly time and shipment are separate and additional.

The Three-Stage Quality Process

Every industrial PC undergoes three critical quality checkpoints:

  1. Pre-Ageing QC - Initial quality control after assembly
  2. 72-Hour Ageing Test - Burn-in testing at elevated temperature (50°C)
  3. Post-Ageing QC - Final quality verification before shipment

This testing ensures that only reliable, production-ready devices reach our customers.

Understanding Ageing: The Science of Reliability

The Bathtub Curve of Electronics Failure

Electronic components follow a well-documented failure pattern known as the "bathtub curve":

Infant MortalityUseful LifeWear-OutTimeFailure RateManufacturingdefectsLow, constantfailure rateComponentdegradation

Three Phases of Component Life:

  1. Infant Mortality (0-100 hours) - High failure rate due to manufacturing defects, weak solder joints, marginal components
  2. Useful Life (100 hours - several years) - Low, constant failure rate - the reliable operational period
  3. Wear-Out (end of life) - Increasing failures due to component degradation

Ageing exposes infant mortality failures before the device reaches the customer.

Why 50°C Temperature?

Operating temperature strongly affects component reliability. The Arrhenius equation shows that for every 10°C increase in temperature, chemical reaction rates approximately double. This principle applies to:

  • Electrolytic capacitor degradation

  • Solder joint stress

  • Semiconductor junction degradation

  • PCB material expansion/contraction

Testing at 50°C accelerates the ageing process:

  • 72 hours at 50°C ≈ 300+ hours at 25°C

  • Weak components fail quickly under thermal stress

  • Components that pass have demonstrated their reliability

Full Load Testing

During ageing, devices run continuously at 100% CPU utilization. Full load produces:

  • Maximum power consumption and heat generation

  • Stress on voltage regulators and power delivery

  • Thermal cycling of all components

  • Verification of cooling system adequacy

Our Ageing Infrastructure

Real-Time Monitoring System

Ageing Chamber at 50°C

We monitor every device under ageing in real time through our custom RMM (Remote Monitoring & Management) system:

Metrics Collected Every 5 Minutes:

  • CPU temperature (all cores)

  • Motherboard sensor temperatures

  • CPU frequency scaling

  • System uptime

  • Power consumption

  • Network connectivity

Temperature Graphs

Temperature Monitoring

Below is an example of temperature monitoring during a 72-hour ageing cycle:

70°C60°C50°C40°C30°C20°C0h18h36h54h72hCPU Core 0CPU Core 1Motherboard72-Hour Ageing Temperature Profile

Key Observations:

  • CPU cores maintain 55-60°C under full load

  • Motherboard sensors show stable 40-45°C

  • No thermal throttling or instability

  • Consistent performance over 72 hours

CPU Frequency Monitoring

We also track CPU frequency scaling to detect thermal throttling:

3.0 GHz2.5 GHz2.0 GHz1.5 GHz1.0 GHz0h36h72hCPU Frequency - No ThrottlingStable at Maximum Frequency

The Ageing Dashboard

Our internal manufacturing team monitors all devices through a live dashboard at /mfg/ageing:

Ageing Dashboard

Dashboard Features:

  • Real-time status of all devices under test

  • Live/offline indicators

  • Total ageing hours accumulated

  • Recent 7-day ageing hours

  • Temperature and frequency graphs

  • Grouped by ageing server

Benefits of Our Ageing Process

1. Eliminates Infant Mortality

Without Ageing:

  • 2-5% of devices fail within first 100 hours

  • Customer experiences downtime

  • RMA process required

  • Loss of confidence

With Ageing:

  • Defective units identified before shipment

  • Only proven-reliable devices delivered

  • Very few early failures

  • Customer confidence

2. Validates Thermal Design

  • Confirms cooling system adequacy

  • Verifies no thermal throttling

  • Ensures stable operation in hot environments

  • Validates component selection

3. Stress Tests All Subsystems

  • CPU and memory under full load

  • Storage I/O performance

  • Network connectivity stability

  • Power delivery reliability

  • Peripheral interfaces

4. Provides Performance Baseline

  • Temperature profiles documented

  • Performance metrics recorded

  • Comparison data for future troubleshooting

  • Quality assurance records

Why We Don't Stock Finished Devices

Bespoke Manufacturing Advantages

Every customer has unique requirements:

  • Different CPU models (Celeron, i3, i5, i7, i9)

  • Variable RAM configurations (4GB to 64GB)

  • Storage options (SSD, NVMe, dual drives)

  • Operating system choices (Thinux, Windows, Ubuntu)

  • I/O port configurations

  • Mounting options (VESA, DIN rail, rack mount)

Stocking finished devices would mean:

  • Guessing customer requirements

  • Inventory carrying costs

  • Risk of obsolescence

  • Limited customization options

  • Higher prices to cover inventory

Build-to-order means:

  • Exact specifications you need

  • Latest component availability

  • No compromise on requirements

  • Competitive pricing

  • Fresh manufacturing (not shelf stock)

The Complete Timeline

Week 1: Manufacturing and Testing

Day 1-2: Assembly

  • Component procurement

  • PCB assembly

  • Initial power-on testing

  • BIOS configuration

Day 2: Pre-Ageing QC

  • Functional testing

  • Port verification

  • OS installation

  • Initial burn-in (4-8 hours)

QC Testing Station

Day 3-5: 72-Hour Ageing

  • Elevated temperature chamber (50°C)

  • Full CPU load

  • Continuous monitoring

  • Temperature logging

Batch of IPCs Under Test

Day 6: Post-Ageing QC

  • Functional re-verification

  • Performance benchmarking

  • Final configuration

  • Quality sign-off

Post-Ageing Inspection

Day 7: Packaging and Documentation

  • Protective packaging

  • Documentation preparation

  • Shipment preparation

Week 2+: Shipment

  • Courier pickup

  • Transit time (1-5 days depending on location)

  • Delivery to customer

Conclusion

Our 72-hour ageing process at 50°C is a critical quality assurance step, not a formality. Every industrial PC we ship has demonstrated its reliability under stress. By removing units with infant mortality failures, validating the thermal design and stress-testing all subsystems, we deliver devices that our customers can rely on for years of continuous operation.

The one-week minimum processing time reflects our commitment to quality over speed. We take pride in every device we build, and we will not shorten testing to save a few days.

When you order a Thinvent industrial PC, you receive a freshly manufactured, thoroughly tested system built specifically for your requirements, not a device taken from a shelf.

This is how Thinvent builds every industrial PC.