I use Nitrous direct3d 11 but it's just as jagged in direct3d 9. This is 3ds max 2015 but it's exactly the same in 2012.
Also, it's relative to zoom. So if I zoom way in, it's less, if I zoom way out, it's even worse.
edit: I just started a new scene and it didn't have the above issues. So I think it's an issue with that scene, possibly related to units coz when I move any item it snaps. Just a hunch.
edit2: manual viewport clipping helps a lot, but I still get really strong snapping when moving objects in the perspective viewport.