I'm getting crashes to desktop when loading large towns in Red Dead Redemption 2 with a FireCuda 540, how do I fix this?

This drive claims to be high-end, but loading into a town would just kick me straight to the desktop—it was honestly pathetic. The FireCuda 540's DRAM cache and the motherboard's PCIe link were having a synchronization gap of 2.1-3.4ms during high-concurrency requests, causing I/O timeouts. I tried downgrading the PCIe mode from Gen4 to Gen3 in the BIOS; the crashes stopped, but my speeds were cut in half, which is a terrible trade-off. I eventually updated to the latest motherboard chipset drivers and changed the disk policy to 'Quick Removal' in Device Manager. After 10 consecutive scene jumps, zero crashes, and speeds stayed around 7,000MB/s. I did get a BSOD during the driver update because of a version mismatch, but cleaning the old driver remnants fixed it. Temps are 55-65℃, and it runs a bit hot. Backed up the driver version that actually works. Config backed up.