Hardware monitoring can be done by temperature measurements.
Free Full version Download: EVEREST Home Edition 2.20
Program Size: 4.19MB
EVEREST Home Edition is a free system diagnostics, system information and benchmarking solution for home PC users.
It offers accurate system information and diagnostics capabilities, including online features, memory benchmarks, hardware monitoring, and low-level hardware information.
Hardware monitoring - Sensor information including system and CPU temperature, fan status, CPU, AGP and DRAM voltage monitoring, S.M.A.R.T. disk health status.