I'm getting weird FPS drops in Nioh during big battles with 64GB G.Skill RAM, should I lock the voltage?

There is nothing like the rush of slicing through enemies in Nioh, but having your FPS tank from 144 to 60 in a split second is a total mood killer. My G.Skill Trident Z Royal DDR5 6800 was jumping between 1.4V and 1.35V with XMP enabled, causing the memory controller to trip and create sync errors. I first tried 'Low Latency Mode' in the drivers, but the spikes stayed—just another dead end. I eventually went into BIOS and manually locked the memory voltage at 1.42V and cranked my front case fans to 1600RPM to keep things cool. Looking at the RivaTuner frame time graph, the jagged peaks were smoothed out into a flat 6-10ms line. I noticed RAM temps climbed by 5℃ initially, but after tuning the fan curve, it settled at 55-60℃. CPU is idling at 65-70℃. Bandwidth is now maxed out and frame generation is a rock-solid 5.1-6.4ms.