How to fix PCIe bandwidth issues on Maxsun B850M WIFI ICE?
This 4K MOD is an absolute hardware killer. The visuals are insane, but the loading was slow as a snail because my GPU was somehow running in PCIe 3.0 mode—absolute joke. The auto-bandwidth detection on the Maxsun MS-eSport B850M WIFI ICE is glitchy, which pushed data transfer latency between VRAM and RAM up to 25-35ms. I tried moving the game to a different SATA drive, which just doubled the load times—a complete waste of my afternoon. I eventually went into the BIOS, forced the PCIe slot protocol from Auto to Gen4, and enabled Re-Size BAR. In the GPU-Z bus interface test, the bandwidth finally hit the 16 GB/s peak, and the texture popping completely vanished. I had some weird boot delays right after enabling Re-Size BAR, but updating the motherboard microcode fixed it. Board temps are sitting at 42-48℃ with fans at 1100 RPM. I exported the sampling data, and the fan speed is rock steady at 1100-1200 RPM. Finally feels like a high-end rig.
