A Closer Look: Interior
Upon opening up the H100 by taking off its left side panel, you’re greeted with a removable plate that is used to mount up to two 2.5” HDD/SSD drives. To be able to install your motherboard, this plate can easily be removed via the two screws at the top and bottom, securing it in place.
Now that the HDD/SSD plate has been removed, you have room to install your Mini-ITX motherboard on the 4 pre-installed standoffs.
Looking at the pre-installed 200mm RGB fan, we see that it’s an MF200R, which operates at 800RPM and is rated for 12V / 0.3A.