Per a post over at the ASUS ROG Forums, ASUS is finally going to bring resizable BAR support to their Z370/Z390 product lines with an estimated timeframe of late April to early May. ASUS has been quite slow with the roll out relative to the competition leaving customers behind. It’s good to see some action from ASUS on this matter, so if you’re looking forward to this feature it may finally arrive in (relatively ) short order.
Read more @ ROG Forums