Nikon D600 Noise Reduction Off ?
They have no effect on the resulting RAW file but they do take some time to process so you should just leave them off if you are shooting only RAW. You might leave them on if you sometimes shoot JPG so that you don't have to change all of those settings when you switch back to JPG.
|Valley by the light of a blue moon by cjf2|
from Down in the Valley
|Lake Erie Stone Pier by yobbyt|
from Dock or Pier