How do I eliminate input lag during stealth approaches in MGS Delta?

Every stealth mission felt like a gamble due to noticeable judgment delays when approaching enemies. I tried increasing virtual memory first, but it only worsened the latency, making the gameplay feel sluggish and unresponsive. I then used GamePP BIOS Load Line Voltage Wizard to lower memory timing to aggressive settings and fine-tune the voltage. After relaxing parameters following an initial blue screen, the system stabilized. GamePP Stress Test confirmed memory latency dropped from 85-95ns to stable levels.