ya, alot of the nforce 2 boards w/ out active cooling need it... like hte epox ones and and the asus, and FIC...
now w/ your' soyo, of course it won't cause hte soyo already had active cooling, if you ahd active cooling, it probally won't help much.
ya orbs are better they move more air around, some high end mobos like this gigabyte one i got, has a nice chipset sink on it, i guess if you have a crappy one, then it would help in the longrun, whether ocing or not