My Intel 660P 2TB is slowing down during complex level loads in Nioh 2, causing massive lag. How do I fix this?

The game would just hitch the moment a fight started, and in a high-speed action game like Nioh 2, that kind of input lag is a total nightmare. Checking the logs, I realized that once the SLC cache on the Intel 660P filled up, the sequential read speed crashed from 1500MB/s to under 400MB/s, sending resource load latency skyrocketing to 40-60ms. I tried lowering the texture quality first, which shaved maybe 2 seconds off the load time but made the game look like mud—completely pointless. I ended up installing the latest official Intel NVMe drivers and disabled the Disk Indexing service in Windows to kill the background I/O noise. In the performance analyzer, read latency tightened up from 45ms to a much healthier 12-18ms, and the loading flow felt night and day. I did hit a snag where file searching became sluggish after disabling indexing, but I fixed that by adding the game directory to the exclusion list. Drive temps stayed between 38-46℃ with power draw around 3-5W. Verified the speed drops are gone, and my RAM temps stayed steady at 58-63℃.