Kelvin icon: a CPU with a thermometer

Hardware monitor · Windows

KELVIN_

Know exactly what your machine is doing.

Real-time CPU, GPU, RAM and sensor readings — temperatures, clocks, load, fans and power. Tiny, quiet, and honest about what it does. No account, no telemetry.

Choose your build

FREE

Kelvin

The everyday monitor. A clean dashboard of your CPU, GPU and memory at a glance.

  • PlatformWindows 10 / 11
  • Size5.2 MB
  • ReadsTemps · clocks · load
  • Version1.0

Free

Download Kelvin

downloads

FREE

RetroKelvin

Runs where nothing modern will — genuine Windows XP support, in 402 KB.

  • PlatformWindows XP → 11
  • Size402 KB
  • Needs.NET Framework 4.0
  • Version1.0

Free

Download RetroKelvin

downloads

Kelvin PRO

The all-out diagnostics suite: fan control, drive health, network, graphs and logging.

  • PlatformWindows 10 / 11
  • AddsFans · SMART · net
  • ExtrasGraphs · logging
  • Version1.0

Free

Download Kelvin PRO

downloads

What Kelvin reads

Temperatures
CPU package, GPU core & memory junction, drives, motherboard.
Clocks & load
Per-core CPU clocks, GPU core clock, utilisation and RAM usage.
Fans & power
Fan RPM, controllable channels, and live wattage draw (Pro).
Health & network
SMART drive verdicts, up/download speed, CSV logging (Pro).

Every build reads sensors directly from your hardware, so it needs to run as Administrator. No account, no background service, no data leaves your PC.