Hi,

basically these options will either increase the performance of parts 
of the system (with chances for compatibility problems) or are 
available to avoid compatibility problems by turning off features. 
Most system vendors seem to be very "conservative" when turning 
on enhancement options, while some motherboard manufacturers 
don=B4t even include these options in their bios.

It was very unusual that applying of the settings I described should 
result in system failure, however poorer performance could result.

The remarks of Linux problems from Linksys gave me the 
impression that this was related to a compatibility problem of the 
card/card-driver-combination. So even if a new driver solves this 
problem finding settings that work with the current driver may help to 
enhance new drivers or help to work around hardware specific 
problems.

By the way such problems are not uncommon, there are legions of 
special card-/mobo-/softwarecombinations that simply will not work 
well together, but each of the involved components work pretty well 
with other components. As far as I know these problems are treated 
as they are and abviously the number of these problems is small 
enough to ignore them.

hope I could be of some help

mike