If you're trying to remove all interrupt moderation, you'll also want to
add these:
RxIntDelay=0,0,0,0 RxAbsIntDelay=0,0,0,0 TxIntDelay=0,0,0,0
TxAbsIntDelay=0,0,0,0
See the app note here for more info:
http://www.intel.com/design/network/applnots/8254x_ap450.htm
-scott