My system just freezes for a split second during big team fights on a Kioxia G4, do I need VRAM?

Whenever ten or more heroes dump their ultimates at once, my PC just hangs for about 0.5 seconds—an absolute disaster in a competitive match. The SLC cache on the Kioxia Exceria Plus G4 hits its limit during high-frequency writes, causing speeds to tank from 5000MB/s down to 1200MB/s. I tried killing all background Windows updates, but the freezes persisted, which was incredibly frustrating. I ended up installing the latest vendor drivers and forced the write caching policy to 'Enabled' in Device Manager, while also tweaking the defrag schedule. CrystalDiskMark showed write latency dropping from 15ms - 28ms down to 8ms - 12ms, and the combat feels way smoother now. I did notice a weird delay during shutdown after enabling the cache, but turning off Fast Startup fixed it. Drive temps are sitting between 55℃ - 68℃. After several stress tests, the write bottleneck is gone and the input lag is finally non-existent.