I think replacing the hardware is not a problem… Do it with out GPU’s at first boot…(to install the new drivers for new hardware…)
Make the appropriate bios settings into motherboard…
I have replaced motherboards in rigs, same name, different brand MB and even CPUs, no issue using the same quality 3.x+ USB.
As others shared, watch out for your overclocks, different motherboards may assign different GPU order. You might be best served bringing up the board without GPUs first.