Also located on the rear were two large cutouts should your setup need external access for water tubing. The rear of the motherboard tray includes seven expansion slots, all of which appear to be Zinc plated.
Another interesting touch on the Osiris is the use of latches, rather than screws, on both side panels. There is no hardware needed to attach the panels, as you simply use both hands to depress and pull. Both panels use thick, sturdy sheets of T5 alloy. I was surprised by the rugged yet simple design and feel. The bottom of these panels used a spring loaded retention clip. I also must apologize as I had an extremely hard time capturing images without the flash being shown due to the finish.
The left panel is fitted with a large mesh protected side display window. The inside reveals the Plexiglas mounts as shown in the below right image. Again all surfaces are anodized black.
Looking at the bottom you’ll find four aluminum feet with rubber pads attached. There is also another flush 120mm cutout to feed fresh air to the power supply unit.
