I've tested every graphics setting in Call of Duty: Modern Warfare 4—tweak these four options for the best performance

Testing every graphics setting in Call of Duty: Modern Warfare 4 shows detail quality, shadow quality, shadow filtering quality and terrain quality have the biggest performance impact. At 1440p, lowering these four from Ultra to Balanced-level values raised average fps from 107 to 124 and 1% lows from 85 to 101. With upscaling enabled, the gain from lowering these settings is much smaller.