Game: Call of Duty: World at War and Call of Duty 4: Modern Warfare
Problem: Lag Spikes - not connection based. Issue occurs in singleplayer and the menu screen. Mouse cursor movements are choppy. In Game, 90FPS steady looking straight without moving. Any/Only camera movements will cause a huge amount of jitter/lag. Normal character movements do not cause jitter/lag.
Occurs: Occured after installing a mod I believe - custom zombies map.
Steps taken to resolve: Deletion of modification from app data folder. Re installation of game.
Additional Info: PC is perfectly capable of this game - has been since a long while. I am not sure if issue lies within Windows 8 or the game itself. CPU Temps are quite normal. Fan does not ramp up that much in this game. Game is installed within a 1TB USB 3 External Drive. No other game is having any issues. Only this one - which eliminates drive failure/malfunctioning. The weird thing is this didn't happen before - I still have the same hardware. Exact same thing happening in Call of Duty 4 - They run the same engine I believe. Both games are on highest available patch.
Specs: AMD FX 8120
ARCTIC COOLER FREEZER 7 PRO REV. 11
HD 6770
12GB Corsair Vengeance LP 1600MHZ Ram(8GB). 4GB Random Ram.