What program should i use to monitor my cpu temp?

I am thinking about overclocking my dual core 6400+ and was wondering what program I should use to monitor my temps.

Thanks

Core temp works well.

Prime95 is the best stress test imo.

Core temps are running between 30 'c and 35'c. What range of temp should I avoid reaching?

Core temps are running between 30 'c and 35'c. What range of temp should I avoid reaching?

duderino_23

There is also motherboard monitor that you can customize for elevated temperature alarm.