CDCDB803: selectable SMBus addresses consult

Part Number: CDCDB803
Other Parts Discussed in Thread: CDCDB800,

Hi Team,

I check the D/S between CDCDB800 and CDCDB803, the major difference I find is that CDCDB803 has selectable SMBus addresses function. I'm quite curious about the usage of this SMBus addresses selection function. Could you pls help me clarify this? And why AMD/Intel usually recommends to use both CDCDB800 and CDCDB803 in their reference design?