Why does my character lag when dodging in Shibuya ruins with Huntkey T400?

Saat dodge di Shibuya, saya panik karena GPU downclocking dari 2400MHz ke 1950MHz (GPU-Z). Saya coba ganti konektor PSU, tapi gagal. Saya pakai GamePP Hardware Sensor Page, ripple 0.15V-0.22V terdeteksi. Saya atur phase count BIOS, ripple turun ke 0.08V-0.12V. Kini 12V stabil 11.9V-12.1V, fan 800-1000 RPM (GamePP).