Hopefully you guys can help with this confusion. This is my first build, I have a powercolor r7 240 and a a68hm grenade motherboard, both said to work via pci 16x. After plugging everything in it says that the graphics card is running at 8x. This card is to eventually be run in dual graphics mode with my amd a8 7650k. Please help- just want to get this thing performing as advertised