Hello, drawing a bit of a blank now. I have an RTX 2070 , with an 8+6 connector on it. My power supply has three eight pins labeled (6+2) for PCI-E. I bought two eight pin cables thinking I could just cut the extra two pins off , but my computer couldn't boot like this. Do I need to buy an 8 to 6 pin cable, or a 6 to 6 pin cable? I'm also really curious as to why cutting the two extra pins didn't work out.