MSI VIA MB:
CPU Halt Command Detection" item in the BIOS Setup
建議把此功能打開，作用是讓CPU在空閒時接受Halt指令，這樣自然也可以降低CPU溫度，相當於在BIOS中的CPU降溫軟體
I tried in KT4 Ultra, worked [BIOS Version 1.4]

NF2 MB: BIOS release 1.7 for NF7/NF7-S v1.0/1.1/1.2 NF7-M v1.2
4. Added "CPU Disconnect Function"option on chipset to turn on/off C1
disconnect.

c1 disconnect=C1 Halt Disconnect is enabled=CPU halt state