Ah ok. The case I'd like to get is seen here with that USB 3.0 header. So I need something like this and connect it to this, which then connects to the case header in the video above, in order to get that 3.0 to work? Damn, that's a lot of work haha.
So how come the adapter I linked in the first comment wouldn't fit in the I/O shield? Is it because that cable is a substitute for the header cable? I'm considering the H81M-E34 instead of the H81M-P33. They are exactly the same, but the E34 has some USB 3.0 headers. It's quite annoying though, as the difference is around £8, just for a 3.0 header :/
And I'm just a bit confused about what pins and pci-e goes where. I'm not quite sure what pci-e actually is, but I think it has to do with the features on the case connecting to the mobo? I'm confused about what the 3.0 pins are compared to 2.0, the pins for the headers, and what the pci-e card actually does and how it works!