As have been reported in other threads, users are experiencing a stuttering issue with visuals. We've asked for your hardware specs (which have been incredibly helpful) but we still need a little more info.
If you are playing a retail copy of the game that was either purchased in store, or through steam, help us narrow this down.
Post your PC Issues here along with the following:
-System Specs (DxDiag)
-Are you overclocking? If you turn off your processor overclock in an area you are experiencing issues, does the issue go away/get better?
-How does the game perform in Windowed mode. If you are experiencing issues with visual stuttering, do they reduce/or get eliminated by going into Windowed mode?
-What are your v-sync settings?
Help us nail down this one last issue for our patch.
ELVEHALDIREDIT: The 12.2 driver can be directly downloaded from AMD Catalyst Control Center and is may be able to resolve the stuttering and freeze issues for The Lord of the Rings: War in the North. This does not work in all cases yet.