Man that is one expensive riser but it sure sounds awesome.

What is the difference between atx version and external version? Don't they both need a regular power supply to run?

I am thinking hard about them. Seems a lot simpler to hook up and run. I am just so confused about do I need a powered or non powered riser. Running at this or that speed. This makes it seem like it is just a "plug and play" type version.

Simpler is better for me.