How to fix PCIe bandwidth and driver stability on MSI Z890 EDGE?
The tearing is most obvious during quick 180-degree turns; it feels like the visual continuity is just being sliced in half. It turns out the PCIe 5.0 lanes on the MSI MPG Z890 EDGE TI WIFI were fighting with my NVMe drive, creating a tiny but noticeable sync offset of 4-7ms. My first instinct was to enable V-Sync, but that was a mistake—it killed the tearing but pushed input lag up to 45ms, which felt disgusting in a fast-paced shooter. I went back into the BIOS and forced the PCIe link speed to Gen 4 instead of Auto, and flashed the chipset driver to version 1,0.4. Using a latency analyzer, I saw the transmission jitter drop from 15-28ms to a tight 3-6ms. I did have a scare where the SSD wasn't detected immediately after the change, but a quick reseat of the M.2 drive and disabling Fast Boot sorted it out. Core temps are now 45-52C and VRMs are 58-64C. After a three-hour stress test, everything is stable and the RAM is holding at 58-63C. It's finally playable without the headache.
