xSiLeNtDx is correct!
Actually, AMD had 3 different max. temps for the K6/x series of processors:
Depending on the chip number/code. The code would tell you which one was the maximum temp for your particular chip. But, almost all of the K6/x series will tolerate 65c so as xSiLeNtDx said, set it to 65c and you will be fine!
PS - Your temps are really good, don't worry about it!
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