SystemMonitor

Live system health on your desktop —” CPU, RAM, disk, network, GPU, sensors with alerts

Windows / Linux Python (PySide6/Qt) / C++ System Utilities

SystemMonitor is a lightweight, always-on-top desktop widget showing real-time system metrics with customizable alerts.

Features

Always-on-Top Widget —” Semi-transparent, click-through optional, multi-monitor
Metric Panels —” CPU (per-core), RAM, Disk I/O, Network, GPU, Temperatures, Fans
History Graphs —” 1h/6h/24h sparklines for each metric
Alert Rules —” “CPU > 90% for 5m â†’ notify”, “Disk < 5GB â†’ warn”
Notification Channels —” Desktop, sound, webhook, email, Matrix
Remote Monitoring —” View metrics from phone via web UI (optional)
Process Top —” Click panel to see top consumers for that resource

Installation

Windows

Download SystemMonitor-Setup.exe from Releases

Linux

# Flatpak
flatpak install flathub io.github.neohiro.SystemMonitor

# AppImage
wget https://github.com/neohiro/SystemMonitor/releases/latest/download/SystemMonitor.AppImage
chmod +x SystemMonitor.AppImage
./SystemMonitor.AppImage

# Arch/AUR
yay -S systemmonitor-git

Configuration

Right-click widget â†’ Settings, or edit ~/.config/SystemMonitor/config.yaml:

widget:
  position: "top-right"
  opacity: 0.85
  click_through: false
  width: 280
  theme: "auto"  # dark, light, auto

panels:
  - cpu: { enabled: true, per_core: true, graph_hours: 6 }
  - memory: { enabled: true, show_swap: true, graph_hours: 6 }
  - disk: { enabled: true, mounts: ["/", "/home"], graph_hours: 24 }
  - network: { enabled: true, interfaces: ["auto"], graph_hours: 6 }
  - gpu: { enabled: true, vendor: "auto", graph_hours: 6 }
  - sensors: { enabled: true, show_fans: true }

alerts:
  - name: "High CPU"
    metric: "cpu.total"
    condition: "> 90%"
    duration: "5m"
    channels: ["desktop", "sound"]
  - name: "Low Disk"
    metric: "disk.root.free"
    condition: "< 5GB"
    channels: ["desktop", "webhook"]
    webhook_url: "https://..."

remote:
  enabled: false
  port: 8765
  tls: true
  auth_token: "changeme"

Supported Sensors

Source	Platform	Metrics
`psutil`	All	CPU, RAM, Disk, Network, Battery
`nvidia-smi`	Linux/Windows	GPU temp, memory, utilization, power
`rocm-smi`	Linux (AMD)	GPU temp, memory, utilization
`lm-sensors`	Linux	CPU/board temps, fan speeds, voltages
`WMI`	Windows	CPU temps, fan speeds, SMART
`powermetrics`	macOS	CPU/GPU temps, power, thermal pressure

Remote Web UI

Enable remote.enabled: true to access:

https://your-pc:8765 —” Full dashboard
https://your-pc:8765/api/metrics —” JSON API for custom clients
https://your-pc:8765/api/alerts —” Alert history

Performance

Idle CPU < 0.5% (single core)
Memory ~45 MB base + 5 MB per panel
GPU Zero when panel hidden; ~2% when visible
Network ~1 KB/s for remote UI

Privacy

No telemetry —” Zero data collection
Local-only —” Remote UI requires explicit enable + auth
No cloud —” All data stays on your machine

windows —” Includes system health checks
linux —” Sensor setup via lm-sensors