Can someone clarify the requirement for Acorn in relation to PCIE bandwidth? I know the Acorn itself is M.2 but do the GPUs it accelerates have to be on full speed PCIE slots, ie. can Acorn accelerate GPUs that are on 1X risers?

I have AMD and NVIDIA rigs on Asrock BTC 110+ plus boards with various numbers of GPUs on them using 1x risers. This board has has an M.2 slot I can put an Acorn into but I am not clear if the Acorn requires the target GPUs to be on a faster PCIE connection