HP Compaq D530 over heating problem

The north chipset become very hot after 20mins usage. The windows xp freezes.
Cause:
1. no fan for north chipset
2. CPU fan is not working faster when the system is busy.
Solution:
1. upgrade to latest Bois, adjust “Fan IDLE”: Value 1-4, I choose 3, it is enough.
2. installed additional fan for the north chipset.

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