jsCpuMonitor

Floating always-on-top window showing real-time CPU utilisation for every logical core. Displays usage history charts, per-core frequency, CPU temperature, RAM usage and power consumption (Intel RAPL).

Features:

• Per-core area chart with 60-second history
• Total CPU aggregate chart
• Per-core frequency (via cpufreq)
• CPU temperature (x86_pkg_temp / coretemp / k10temp)
• Intel RAPL package power in watts
• RAM usage
• Throttle indicator (turns red when the CPU throttles due to heat)
• Available in 22 languages: English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Czech, Hungarian, Romanian, Swedish, Danish, Finnish, Greek, Turkish, Russian, Japanese, Chinese, Korean, Arabic, Hebrew (Automatic follows the system language)
• Light and dark theme (Automatic follows the desktop)
• All colours configurable
• Window position and size are remembered across sessions
• Crash reporter with optional e-mail support

▶ TEMPERATURE, POWER & FREQUENCY READINGS

sudo snap connect jscpumonitor:hardware-observe

The app works without it — those fields are simply hidden until connected. No reboot or restart required.

Supported systems:

• Ubuntu 24.04+, Fedora 40+, Arch Linux, openSUSE Tumbleweed
• Any Linux desktop with X11 or Wayland
• x86_64 (64-bit)

Developed by Josef Sejrek / Budbrain Software Contact: jsCPUMonitor@budbrain.de | www.budbrain.de