Agreed. The h81 supports 30 series graphics cards.
However, the Acer h81h3-amCPU can not play the performance of the 30 series graphics card and can not overclock, even with the highest I74790K video frequency, the highest graphics card can be used is almost GTX1060, 6G or GTX1650S this level of graphics card. Even the RTX2060 or the 3-series lowest RTX3050 has a slight bottleneck. (for reference only)
Can be used, but pcie3.0 interface bandwidth speed limit, 30 series will not be able to play all the performance, a little overused