The Witcher Remake keeps crashing during large battles on my G.Skill Trident Z Neo; is the memory controller unstable at 6400MHz?

I finally got the game running smoothly, but the honeymoon phase lasted exactly ten minutes before it crashed straight to the desktop. The logs showed that my G.Skill Trident Z Neo DDR5 6400 was suffering from voltage drops under heavy load, leading to read/write errors. I tried forcing the voltage up to 1.45V, but that just sent the RAM temps soaring to 68-75℃ and made the crashes even more frequent—a total fail. I decided to play it safe and downclocked the frequency to 5600MHz and manually tuned the timings to 32-38-38-80. I ran AIDA64 for 5 hours straight with zero errors, and the crashes are gone. I was worried about losing FPS, but it only cost me 1-2 frames, and the stability is worth every bit of that loss. The VRMs are now at 52-58℃ and the CPU is idling around 60-66℃. I saved this as a BIOS profile and now the RAM stays cool at 52-58℃.