Solving PCIe bandwidth issues on Colorful BATTLE-AX B450M-T?
Every time I used a high-speed dash, the edges of the screen would rip horizontally, which was incredibly distracting. I opened GPU-Z and noticed the PCIe link was flipping between 3.0 x16 and 3.0 x8 during load spikes, adding a nasty 12-25ms of latency. I first tried enabling V-Sync in the driver, but that just pushed my input lag over 40ms, which felt like playing in mud. I ended up flashing the latest 1.24 firmware from Colorful and forced the PCIe speed to Gen3 in the BIOS instead of leaving it on Auto. In my tests, the link stayed locked at x16, and the tearing vanished even at 4K. I did have a scare where my NVMe drive stopped being detected after the update, but loading BIOS defaults and then re-setting the PCIe mode fixed it. The VRM temps are now 62-68℃ with fans hitting 1800-2100 RPM. 3DMark stress tests confirm it's stable, and the controls feel way more responsive now.
