I'm getting massive frame drops during fast building in Fortnite with a Zhitai TiPro9000 4TB. Fix?

I noticed severe screen tearing during rapid cover placement, with frame times jumping erratically between 16-50ms. It felt absolutely terrible in a competitive match. Digging deeper, I found the Zhitai TiPro9000 was glitching between PCIe 3.0 and 4.0 under load, causing throughput to fluctuate between 3.2GB/s and 7.1GB/s. I tried enabling low-latency mode in the drivers, which helped input lag but didn't stop the frame drops—just a band-aid solution that left me frustrated. I eventually went into the BIOS and forced the M.2 slot protocol to Gen4 instead of 'Auto' and flashed the latest firmware. RTSS showed frame times stabilizing at 13-17ms, and the smoothness was a night-and-day difference. Interestingly, boot times slowed by about 3 seconds after forcing Gen4 until I disabled Windows Fast Startup. Drive temps settled at 52-60℃ with fans humming at 1400 RPM. Three hours of testing confirms the I/O bottleneck is gone.