Ok, so I've noticed this while playing Skyrim and Fallout: New Vegas but I really notice it with Medal of Honor; Warfighter.

I officially ended my boycott of EA yesterday; I still hate them but I enjoyed the reboot in 2010 and wanted to try the new MoH and at $29 I felt it was time.

Anyway, when I use a scope or zoom in in the game the mouse gets very choppy. So choppy in fact that it's almost impossible to use a sniper rifle or any "weapon" in game that has some sort of scope/sight.

I'm using an HTPC case and I'm assuming this may be due to poor air flow and the GPU heating up. But When playing games I turn all the fans up to 100% including the GPU fan. Could it be a driver conflict? Software update needed?