[CentOS] RFI: recommendation for temperature monitoring

Good morning gurus,

I would like to get recommendation for monitoring temperature
for cpu using Asus P5WD2 motherboard and Intel D 820.
I my installation has CPU cooling system changed from Intel bulk to
Zalman CNPS9500 and it works. Normal Intel cooling system is not
enough and is overheating cpu quite badly. Unfortunately Zalman
has to be controlled (rpms) manually and thus I would like to see
the temperature.

Which program is doing well this task ?

Regards,
Kari