Why is there a noticeable command delay when executing fast moves in Tekken 8 with Kingbank Yin Jue DDR4 3600?

There was this awful 'gluey' feeling between pressing a button and the character actually moving—a total nightmare for a fighting game. The default timings on my Kingbank Yin Jue DDR4 3600 were all over the place, with latency swinging between 65-78ns, pushing the end-to-end response time up to 28-35ms. I started by killing every useless background service in Windows, but it only shaved off 1ms, which did absolutely nothing for my anxiety. I went back into the BIOS and gradually tightened the primary timings from 18-22-22-42 down to 16-19-19-38, while bumping the memory voltage from 1.35V to 1.38V. My latency tester showed the response time plummeting from 32ms to a crisp 14-18ms, and the moves finally felt light. It wasn't a smooth ride, though; the first time I tightened the timings, I got hit with random BSODs until I loosened tRAS from 38 back to 40. Memory temps hovered around 42-48℃, and the motherboard VRM stayed between 58-63℃. After three hardcore matches, the input lag is completely gone, and temps are holding steady at 42-48℃.