Is this an Intel(R) Desktop Board? Could you provide us with the model?
No, it is not a deskto borad from Intel, it is customized one with standard intel chips, cpu, north bridge, south bridge.
I have check the spec of ICH8, which pointed that SLP_S3# is from ICH8, is for power plance control, shuts off power to all non-critical systems when in S3, S4, S5 states. That comes to my question, is this singal a proper one to regulate the CPU core voltage?