Is the stock passive heatsink good enough for overclocking on most i865 boards?

[Lyfer]

I know with Nforce 2 boards they south bridge gets very hot past 200mhz fsb, is this the same issue with i865/875 boards?

 

[lookouthere]

bump

 

[wicktron]

I don't have any northbridge/southbridge heat issues to speak of.