XenoCPUUtility Legacy Edition

A backport of XenoCPUUtility benchmarking and stress testing tools for Windows XP, Vista, and Windows 7.

Features

This legacy version includes all the core performance testing functionality:

Benchmarks

• Single-Core Benchmark - Measures peak single-thread floating-point performance
• Multi-Core Benchmark - Aggregates all CPU threads for total throughput
• Path Tracing Benchmark - CPU-intensive ray tracing workload

Stress Tests

• Heavy Load Stress - Continuous sqrt/sin/cos workload for sustained 95-100% CPU saturation
• Instability Check Mode - 4-phase rotating workload to detect marginal CPU instabilities and voltage droops
  • Phase 1: FP-heavy (sqrt/sin/cos)
  • Phase 2: Integer operations (bit manipulation)
  • Phase 3: Memory operations (pointer chasing simulation)
  • Phase 4: Mixed bandwidth workload
  • Periodic idle dips to detect voltage regulation issues

Control Features

• Pause/Resume stress testing
• Real-time status display
• CPU info and metrics display

System Requirements

• OS: Windows XP SP3, Windows Vista, or Windows 7
• RAM: 1GB minimum
• .NET Framework: 4.0 or higher

Compatibility

This version is built on .NET Framework 4.0, which supports:

• ✓ Windows XP SP3
• ✓ Windows Vista
• ✓ Windows 7
• ✓ Windows 8+ (obviously)

Building

Prerequisites

• Visual Studio 2010+ or Visual Studio Build Tools
• .NET Framework 4.0 Target Pack

Compile

msbuild XenoCPUUtility-Legacy.csproj /p:Configuration=Release

Or open in Visual Studio and build normally.

Usage

1. Run XenoCPUUtilityLegacy.exe
2. Click a benchmark button to run performance tests
3. Click a stress test button to begin CPU stress testing
4. Use Pause/Resume to temporarily suspend testing
5. Click Stop Stress to end testing

Results appear in the text box with timestamps.

Architecture

Core Components

BenchmarkEngine.cs

• Single-thread benchmark using math operations
• Multi-thread benchmark with parallelization
• Normalized scoring system

StressEngine.cs

• Heavy Load mode: continuous FP workload
• Instability Check mode: rotating 4-phase workload
• Pause/Resume via ManualResetEvent
• Thread-safe operation

PathTracerBenchmark.cs

• Simple path tracing renderer (no dependencies)
• Simplified Vector3 math implementation
• Sphere and plane ray intersection
• Parallel pixel processing

HardwareMetrics.cs

• CPU load via Performance Counters
• CPU frequency via WMI
• CPU core/thread count

MainForm.cs

• Simple WinForms UI (no WebView2 dependency)
• Results display
• Benchmark/stress control

Differences from Modern Version

1. No WebView2 - Uses simple WinForms UI instead
2. No RAMStress - Removed memory stress module (can be added if needed)
3. No WHEA monitoring - Simplified hardware error detection
4. Simplified graphics - No chart rendering (results only in text)
5. .NET 4.0 only - No C# 8+ features, using older patterns

Performance Notes

• Single-core benchmark targets ~10 seconds
• Multi-core benchmark targets ~6 seconds
• Path tracing is CPU-bound and scales with thread count
• Stress test utilizes all available cores by default
• Tests are deterministic (same seed for reproducibility)

License

Ported from XenoCPUUtility by nkthebass Legacy version created for historical OS support