The Centurion 590 that Cooler Master sent over does not have the optional side panel window, but incorporates two fan locations in a solid panel instead. Two more are located in the top towards the rear of the case and an additional opening is on the opposite side panel located roughly where the underside of the CPU socket might be. The front is covered in mesh with a small spot for the power switch and I/O panel at the very top.
The rear of the case shows a standard ATX format, but with the power supply located at the bottom. Another fan opening is located above the motherboard I/O panel and is drilled for a single 80, 92 or 120mm fan. Thumbscrews are used to hold both side panels in place but the top is riveted on. There are also two rubber grommets for water cooling tubing to pass through.
The top and left side panels have mounting holes for 80, 92, 120 or 140mm fans. The right side panel appears to be roughly 80mm in size, but without any way to attach a fan. The side panel holes are obviously spaced for CPU and GPU cooling, with the bottom GPU opening moved slightly more towards the front of the case. The top locations would make an excellent place to mount a double-size radiator if you happen to use water cooling.
The front bezel pops off with a slight tug at the bottom, with no wires tying it to the case. There are two USB ports, Firewire and audio at the top along with the power button and HDD/power LEDs, but no reset switch. The nine bay covers are all mesh with foam inserts for filtering the air. There is a 5¼" to 3½" bay adapter at the top with a matching cover for a floppy drive, and a hard drive cage with intake fan and room for four 3½" drives at the bottom. Both can be removed or relocated to any of the nine bays.
Now let's take a look inside the Centurion 590.