How to fix PCIe bandwidth issues on Soyo SY-Yanlong B550M for Dead Space?
Walking through those detailed ship corridors in 4K was incredible, but every time I turned quickly, the FPS would dive from 80 to 40. It felt jarring on my high-refresh monitor. I realized the Soyo SY-Yanlong B550M was defaulting the PCIe slot to Gen 3, capping the bandwidth at 15.8GB/s. I tried the 'Ultimate Performance' power plan in Windows, but the drops persisted, which proved it was a hardware link issue. I went into the BIOS and hard-locked the PCIe link speed to Gen 4. After that, GPU-Z showed the bandwidth jump to 31.5GB/s, and the stuttering disappeared. I did hit a snag where the system black-screened on the first reboot after the change, but a VBIOS update for the GPU fixed it. Motherboard temps are steady at 48-55℃. I used a performance comparison tool to verify the link speed, and the transfer mode is now perfectly locked.
