How to fix memory latency spikes in Red Dead Redemption 2?

I was so excited to gallop through the wild west, but memory latency jumped from 72ns to 98ns, causing a stutter every time I turned. I tried increasing the Windows page file to 32GB, but it was a waste of space and did nothing for the lag. I used the GamePP BIOS Load-Line Voltage Adjustment Guide to raise SOC voltage to 1.2V and tightened timings to 16-20-20-38. AIDA64 latency tests showed values converged from 90-110ns to 65-72ns, and HWiNFO confirmed memory temps at 42-48°C.