How to fix long loading times in Unreal Engine 5 on Sapphire RX 9070 XT?

Waiting 5 seconds for a scene switch in the UE5 Demo was a total immersion killer. I tried rolling back to an older driver, but it made things worse, causing 8-second stalls and black screens. I used GamePP Peripheral Driver Conflict Detection to update to version 24.10.1 and kill background updates. RTSS showed the latency drop from 5.2s to 1.5s. GamePP sensors kept the GPU at 65-72℃. The flow is finally back, so I can fix my build settings.