Solving PCIe lane competition on Onda B760ITX-B4
This Onda B760ITX-B4 has been testing my patience. Every time I swing the Leviathan Axe, the action on screen is about 100ms behind my thumb. It feels like fighting underwater. A latency analyzer showed the NVMe drive and GPU were fighting for PCIe lanes, causing I/O wait times to jump between 15-40ms. I tried moving the drive to another slot, but the speed halved and the stuttering got even worse—I was honestly ready to toss the board in the trash. I eventually went into the BIOS, forced the PCIe link speed to Gen4 instead of Auto, and killed every single 'power saving' option. RTSS showed input lag drop from 45ms to a crisp 12-18ms. I did have some severe drive disconnects right after the change, but updating the chipset drivers fixed it. VRM temps are 62-70℃ and CPU power is 95-110W. Exported the logs to confirm the spikes are gone, and fans are steady at 1400-1600RPM.
