How to fix WD SN850 2TB I/O stutters in The Witcher Remake?
It was absolutely ridiculous. Walking through town felt like watching a low-budget slideshow, with the screen hitching twice every second. I checked the WD SN850's read/write curves and saw the latency swinging wildly between 40ms and 120ms during random small file access, which basically choked the entire rendering pipeline. I tried disabling the Windows page file, but that just led to an immediate crash—total waste of my life. I went straight to the Western Digital Dashboard and flashed the firmware to version 2.1.0, then forced the PCIe mode to Gen4 in the BIOS instead of 'Auto'. Using RTSS, my 1% lows jumped from 20 FPS to 45 FPS. The funniest part was that I almost bricked the drive during the update because of a power flicker, leaving it in read-only mode until I reflashed it. Temps are stable at 50-55℃. I exported the I/O error logs from Event Viewer to confirm the fix, and it's finally rock steady.
