The answer is that the h81m-k motherboard can be configured with an i7 4790cpu.
But the most suitable is the h81 with the i3 4170cpu. The highest cpu, the h81 motherboard can not play full performance. The h81 motherboard is an entry-level motherboard, and the i34 generation is more balanced and suitable for collocation.
The most suitable graphics card for h81 plus i3 4170 is the 1050 graphics card. This graphics card can play PUBG as well as League of Legends.
So h81m-k with i3 4170 is suitable.
You already have ASUS H81ML-K motherboard, 669 pieces with i3 4170 loose pieces, Inset GTX1050.2G black gold, 899 pieces, so it is a high collocation, and low collocation, G3260 loose pieces 319, rainbow GT740.2G graphics card, 559 pieces, depending on your economic ability to choose,