Why is my Kingbank Black Blade DDR5 6000 causing clock jitter and stutters during high-speed driving in Forza Horizon 5?

While tearing through the Mexican highways, I noticed these annoying micro-stutters where the frame time was wildly jumping between 8ms and 22ms. With the Kingbank Black Blade DDR5 6000 64GB kit handling massive environmental assets, the memory controller was fluctuating around 1.35V, causing instruction latency to swing from 72-95ns. I tried enabling 'Ultimate Performance' mode in Windows, but that was a total waste of time; surface-level tweaks are useless against hardware-level clock drift, which honestly left me feeling pretty defeated. I eventually dove into the BIOS and manually locked the VDD voltage at 1.38V while loosening the tRFC from 480 to 520. Checking the RTSS overlay, the jagged frame time graph finally flattened into a straight line, and the input felt snappy again. I did hit two random reboots during the first voltage lock, but things settled down once I bumped tRAS from 76 to 80. Memory temps stayed between 48-54℃ and the CPU hovered around 65-72℃. After running benchmarks, the stutters are gone, and frame times are rock steady at 8.2-9.1ms.