Installing The Motherboard Outside
The Coolermaster case comes with a removable tray for installing your computer hardware. This way, you can install your motherboard and all the other hardware on your mobo externally. That also includes your graphic board and any other PCI cards.
The tray can be removed after you remove the thumb screws.
Once the tray is removed, it is easier to install the motherboard, graphics card, CPU and RAM.
The expansion cards are attached to the tray with thumb screws.