Back when we did our Aluminum Case Round Up, we looked at a Skyhawk case that had something that no other case had. It had a vertical bar that was there to keep the PCI cards in place securely. This is a good option for people who bring their cases around to places.
So what's on the 8870? Yup, a vertical bar also to help keep those cards in check. You can remove the bar if you wanted, but let me show you how this thing works.
You take the green plastic stabilizer and shove it in the notch in the vertical bar. Position it above any card you want and you got yourself a support beam. Only two of these green workers were provided, so that doesn't give too much room for any extra components. Again, strange.
The 8870 comes in two flavors of PSUs. We received ours with a Channel Well 300W power supply. There are also 400W versions I believe for a higher price.