ASRock Rack X470D4U comes with onboard BMC and doesn't use integrated graphics. Also you can limit the power that the iGPU uses if you absolutely want, but as

ASRock Rack X470D4U comes with onboard BMC and doesn't use integrated graphics. Also you can limit the power that the iGPU uses if you absolutely want, but as long as it is mostly idle I see no reason to do that.