Why is my Witcher build unstable at 6800MHz with Corsair DDR5?

Frame drops during combat were frustrating. Manual timing tweaks caused crashes. I used GamePP System Backup & Config Export to set voltage to 1.45V and timings to 32-38-38-108. GamePP Stress Test confirmed stability, and frame rates stayed consistent. HWiNFO verified 1.45V. It's rock solid now.