There are two versions of the Athlon 1200 cpu (assuming you mean Athlon and not Duron).

One with an OPN A1200AMS3C which uses 9x clock multiplier and a FSB of 266(133MHz).

And one with an OPN A1200AMS3B which uses 12x clock multiplier and a FSB of 200(100MHz).

Both have a max Die temp of 95 degrees C.

Check your multiplier clock and FSB settings to match which ever cpu you are using.