I'm getting massive rendering lag when expanding my city in Cities Skylines II with ADATA DDR5 4800. Should I tweak the memory controller?

The second I tried planning a massive transit hub, that smooth zooming feeling just vanished, replaced by a glaring 160ms lag. In a city sim, that's basically unplayable. The memory controller on my ADATA ValueRAM DDR5 4800 was struggling with voltage instability under high-res MOD loads, causing tiny checksum errors that forced the CPU to keep re-reading data. I tried enabling 'Game Mode' in Windows, but that just slowed down my background apps and did nothing for the lag—I was honestly tempted to just throw the PC out the window. I went into the BIOS, changed the memory controller voltage from Auto to a manual 1.22V, and tightened the tRFC timing from 480 to 420. AIDA64 showed latency dropping from 82ns to 71ns, and the responsiveness became instant. I did have a brief black screen during boot after lowering the voltage, so I bumped it back to 1.25V for total stability. RAM temps are holding at 48-55℃.