What do i use to monitor my computers temperature ?

[Mrr]

Like the cpu / gpu, etc.

Any recommended programs ?

Then once I know the various components temperature, how do I know if they are running at a healthy level ?

[chazus]

Coretemp and CPU-Z are a good way to monitor CPU activity/load/temp. Speccy shows system information in a nice neat arrangement. HWMonitor gives good fan speed and power info.

[Mrr]

thank you sir !