Starfield is dropping frames in New Atlantis on my Soyo B550M due to high CPU interrupts. Should I change port assignments?

Walking through the busy streets of New Atlantis, my frame rate would randomly bounce between 60 and 40 FPS, which was incredibly annoying. Device Manager showed that EMI on the USB 3.0 ports was spiking system interrupts to 15-22%, stealing precious CPU cycles. I tried swapping to high-end shielded cables, but while it helped a bit, the FPS jitter remained—a hardware-only fix wasn't enough. I moved all high-bandwidth peripherals to different controller ports on the rear I/O and disabled unnecessary serial communication in the BIOS. Using RTSS, the frame time variance tightened from a messy 12-25ms to a smooth 8-11ms. My mouse sensitivity felt slightly off after the move, but a quick polling rate recalibration sorted it. CPU temps sat at 65-72℃. Interrupts are now below 2%.