Okay, so I have a Gigabyte Z370M D3H motherboard. I was reading its specs here about the Expansion Slots, and I can't understand most of it. What's " x16 ". I have measured it's size which is 8cm.
But what's the meaning of
1x PCI-E 3.0 x16 @ x16
1x PCI-E 3.0 x16 @ x4
2x PCI-E 3.0 x1 @ x1
I...