The chassis has a large bridging support between the back and the 5 Drive bays. This support runs across the CPU so your large passive coolers may have problems fitting, if so you can remove this bridge and have the chassis without it. Working forward from the rear, there is quick PCI release tools, very simple and easy to use, they hold quite well. But as always I suggest you remove them if you plan to install any expensive hardware in the slots, and screw the hardware in.