Hi, I have my RX-V681 connected to my PC, but I can't manage to set my display to 4k @ 60Hz when I'm connected through the receiver. (only working when connected straight from the TV) I do have everything compatible from the PC to the TV, including the cable (HDMI 2.0 / 2.2). I tried to switch the receiver to mode 1 from the advanced mode, but not luck, I can only have 30Hz. Any idea how to fix that? Many thanks in advance.