Is Primal Carnage dropping frames on the ASRock A320M because of PCIe bandwidth limits in complex scenes?

When you're in the middle of a dinosaur brawl, you need everything to be seamless, but the A320M kept throwing these annoying frame time spikes. Monitoring showed that because the A320 chipset has such limited PCIe lanes, high-bandwidth data streams were hitting 22-42ms of abnormal latency, causing the image to hitch. I first tried enabling Low Latency mode in the drivers, but that actually made the frame drops more frequent—a weird contradiction that was as confusing as it was annoying. I eventually flashed the BIOS to the final available version and completely disabled PCIe Link State Power Management in the Windows power plan. RTSS showed the frame times converged from a wild 16-48ms range down to a stable 18-24ms, which made a huge difference in feel. The BIOS update wiped my boot order, so I had to set that up again. CPU temps sat at 75-81℃ and the VRMs were pushing 82-88℃. Switched the system to High Performance mode, and the bandwidth bottleneck is finally under control.