I'm getting terrible 1% low FPS drops during combat in Code: Jie on my MSI A520M-A PRO. Help?

The screen would just tear and stutter during intense firefights, which completely killed the combat flow. After digging into the logs, I found that the MSI A520M-A PRO's auto-overclocking was constantly switching frequencies under load, causing memory latency to bounce between 85-110ns. I tried increasing the virtual memory to 64GB, but that did absolutely nothing—the minimums were still hovering around 32 FPS. I eventually went into the BIOS, disabled the auto-OC, and forced the RAM to a locked 3200MHz with manual timings of 16-18-18-36. Looking at the RTSS frame time graph, the jagged spikes flattened out, and my 1% lows jumped from 32 FPS to 54 FPS. It wasn't a smooth ride, though; I hit two random reboots early on until I bumped the DRAM voltage from 1.2V to 1.35V. Now, the RAM stays between 42-48℃ and the southbridge is around 55-60℃. I ran four passes of MemTest86 to confirm zero errors, and the RAM temp is holding steady at 42-48℃.