Asrock h570 phantom gaming 4 - Probleme with more than 2 GPU and video output

First when i boot on Windows (igpu enabled in bios) i have a video output, when i boot whith hive os no video output neither from the MB or a GPU pluged directly in…
Anyway, Hive os boot and work well with 2 GPUs, as soon as i plug a third one or a fourth … Hive os still start, miner also start i see all my gpus etc… but ONLY ONE IS MINING. I really don’t understand if anyone has an idea …

PS: Bios settings : PCIe Gen 2, Enabled 4G decoding, IGPU enabled, Bios up to date, fast boot disabled …