hmmm is it just with nba live or with your whole PC ??
If thats the case just adjust your card .u know tighten a bit.
if its just live, then re-install the game....
if that doesnt work, then go to easports.com n mail the technical issues department (just look around the site u'll find it sooner or later).
State the name of your card and ask them if there are any known issues with the card and the game, make sure your state the EXACT name of the card because little diffz do count.
Hope it helps