My Gigabyte RTX 5060 Windforce is stuttering randomly in Nightingale's foliage. Why is this?

This card was absolutely struggling with the lighting in this game; my 1% lows dropped to 25 FPS, making the experience feel like a slideshow. The Gigabyte RTX 5060 Windforce runs its memory at 21 Gbps in factory OC mode, but under extreme load, it was throwing rare checksum errors that forced the driver to reset. I tried dropping the resolution to 1080p, but while the average FPS went up, those random hitches remained—it was a joke. I ended up underclocking the memory by 100MHz and cranking the case fans to 1600 RPM to keep the VRAM cool. In RivaTuner, the frame times tightened from a messy 15-40ms to a stable 12-16ms, and the stuttering vanished. I did notice some slight texture pop-in after the downclock, but adding a small +15mV offset to the core voltage fixed that. VRAM temps are now sitting at 70-76℃, and the core is at 62-68℃. I exported the logs, and the fan speed is rock steady at 1400-1600 RPM.