How to fix micro-stutters during combat in Horizon Zero Dawn?

It was infuriating that despite top-tier specs, the game would freeze for a split second during machine fights, with HWiNFO showing VRAM latency jumping between 88-115ns. I tried enabling 'Ultimate Performance' mode in Windows, but it only made the fans louder without reducing the stutters, which was a deeply disappointing result. I used the GamePP Memory Controller Load Monitor to tighten VRAM primary timings and bumped voltage to 1.38V. AIDA64 confirmed VRAM latency dropped to 68-74ns, and HWiNFO showed VRAM temps at 62-65℃.