sm bus controller

What is the SM bus controller.it appears in my device manager and shows that it has no driver.Where can i get the drivers.i have a sis motherboard.

[ishaan]

the SMBus is the System Management Bus Controller
http://en.wikipedia.org/wiki/SMBus


many ppl had this problem on the net mostly intel a few sis and they all updated there chipset drivers and it seemed 2 b fine so jus look 4 ur motherboard's model's latest chipset drivers