GPU usage on my Mac Pro is through the roof -- sounds like a jet engine with all the fans at top speed. Exporting a 30 minute video to H.265 (60fps, 1080p) with one effect (exposure/gamma) is putting both GPUs on the Radeon Pro Vega II Duo bove 80% usage. And it's no faster than the previous version (takes about 15min to export). Mac Pro, AMD Radeon Pro Vega II Duo, 224GM RAM, 16-code processor, Big Sur 11.3 (going to 11.3.1 this afternoon). Fans died down when the export was finished and usage went back to normal. Repeatable.