Why does Resident Evil 9 stutter during combat on ASUS B660M?

While exploring eerie abandoned facilities, I noticed frequent micro-stutters that felt totally jarring. I tried setting the Windows power plan to Ultimate Performance, but that just made my temperatures climb and actually increased the frame drops. To fix this, I used the GamePP BIOS Load-Line Voltage Adjustment Wizard to set the load-line to L2 mode and tuned the offset voltage to +0.02V. The twitching vanished as core voltage stabilized at 1.22-1.24V per HWiNFO64, with VRM temps at 82-86℃ per AIDA64 and fans at 1400-1600 RPM per GamePP.