Why does my Asgard Thor DDR5 6400 32GB kit cause stuttering during heavy lighting scenes in Callisto?

While exploring the depths of the colony, I kept hitting these random micro-stutters that completely messed up the combat rhythm. It turned out the default timings on my Asgard Thor DDR5 6400 were throwing 12-18ns random latency spikes under heavy load, which absolutely tanked the CPU cache hit rate. I tried enabling Game Mode and killing all background apps, but the drops still happened about three times a minute—software tweaks were basically useless here. I eventually dove into the BIOS Advanced settings and bumped the memory voltage from 1.35V to 1.38V, while manually tightening the tRFC from 480 down to 420. Running AIDA64, my read/write bandwidth stabilized at 88-91GB/s (up from 82-85GB/s), and the frame time variance shrunk from a messy 11-24ms to a tight 8-12ms. I actually tried pushing it to 6600MHz at first, but it triggered a system protection reboot immediately. I had to settle back at 6400MHz and focus on secondary timings to get it stable. Temps sat between 52-58℃, and the heatsinks felt warm to the touch. Saved the whole profile in the BIOS and it's been smooth since.