Whilst I had this PC apart, thought I would take a photo to show that this case will only take the smallest of MATX boards, inside the case is a MATX BIOSTAR a68 FM2 BOARD, outside is a ASUS MATX workstation board. As you can see this board would be halfway through the PSU. I have now installed an H110 motherboard since this photo was taken. and I had to use an SFX PSU becuaseit was so tight you couldn't plug the ATX power into the motherboard. basically you cant use any motherboard that extends further than the second mounting holes