Why does The Last of Us Part I stutter on my Gigabyte RTX 5060?

I was mid-firefight when the screen started tearing violently. AIDA64 showed VRAM hitting 95% while frame time jumped from 8ms to 15ms. I tried lowering textures to medium, but the visual loss was painful. I opened the GamePP DLSS/FSR Image Sampling Calibrator, set render resolution to 80%, and enabled DLSS Quality. I then raised the sharpness parameter from 50 to 70 to restore clarity. Now, HWiNFO confirms stable temps at 68-72℃, and RTSS shows consistent 16.6ms frame times, finally saving my gaming experience from this bottleneck.