Troubleshooting PC Performance with System Information Viewer (SIV)

How to Use System Information Viewer (SIV) for Windows Diagnostics

System Information Viewer (SIV) is a lightweight diagnostic tool for Windows that gathers and displays detailed hardware and system information in a single interface. This guide shows how to install SIV, navigate its main features, run common diagnostics, interpret key data, and export reports for troubleshooting.

1. Install and launch SIV

1. Download the latest SIV build from the official developer page (choose the portable ZIP or installer).
2. If you downloaded a ZIP, extract it to a folder and run SIV.exe. If you used an installer, run the installed application.
3. If Windows SmartScreen or antivirus warns about the executable, confirm the source and allow the app if you trust it.

2. Understand the main interface

• Summary/Overview: Top-level snapshot of CPU, memory, motherboard, GPU, storage and OS. Good for a quick health check.
• Hardware sections: Separate tabs or panes for CPU, memory, disks, GPU, network, sensors, and BIOS. Click any item to expand detailed fields.
• Sensors/Temperatures: Real-time readings for CPU/GPU temperatures, fan speeds, voltages, and power — important for thermal and power issues.
• Processes/Services (if available): Current running processes and resource usage to spot abnormal CPU or memory consumers.
• Logs/Errors: Any detected hardware errors or system event summaries shown for quick diagnostics.

3. Run basic diagnostics

1. Start SIV and let it populate system data (a few seconds).
2. Check CPU: verify model, core count, base/turbo clocks, and current utilization. High sustained utilization at idle indicates background processes or malware.
3. Check Memory: installed capacity, slots used, speed, and timings. Mismatched DIMMs or incorrect speeds can cause instability.
4. Check Storage: model, SMART status, temperature, and read/write statistics. Look for SMART warnings (Reallocated Sectors, Pending Sectors).
5. Check Temperatures & Fans: idle vs load temps. CPU temps above ~85°C under load may require improved cooling. Fan not spinning or erratic speeds indicate cooling failure.
6. Check Power & Voltages: large deviations from expected rails (+12V, +5V, +3.3V) can suggest PSU issues.
7. Check GPU: driver version, temperature, and utilization; graphical artifacts or high temps may indicate GPU problems.
8. Check Network: adapter status and link speeds if experiencing connectivity issues.

4. Use real-time monitoring

• Open the sensor pane and observe temperatures, voltages, and fan speeds while performing a stress task (e.g., run a benchmark or game).
• Note how temperatures and fan speeds change; slow or no fan response indicates fan control issues.
• Use utilization graphs to correlate high CPU/GPU usage with thermal or performance problems.

5. Export reports and logs

• Use SIV’s export or save function to generate a system report (text/CSV).
• Include exported reports when seeking help on forums or with support—reports provide precise hardware IDs, driver versions, and sensor logs.

6. Troubleshooting examples (actions to take)

• High CPU usage at idle: check the Processes list, update drivers, scan for malware, and review scheduled tasks.
• Overheating: clean dust, reapply thermal paste, improve case airflow, check fan headers and BIOS fan curves.
• Unstable system