Before installing the motherboard, we must screw in the spacers in the respective holes (from the indication, we will put the spacers in the A=ATX holes, because we will install for the test a P55 ATX motherboard):



The cards can be easily secured with the provided retention mechanism, which has feet that press against the PCI brackets of the cards. I have tried to move the video card after fixing it and it is secured really good almost like using screws instead of the provided retention mechanism:



In the back of the 5.25’’ covers we can find an additional air filter, to avoid dust accumulation inside the case:



After the motherboard installation, we can see that there is enough space around it to route the cables; I would still recommend a modular power supply to be used, so we won’t have lots of unused cables gathering dust inside the case and occupying space unnecessary:



Inside the case, where we must mount the power supply, we can find 4 rubber feet, which help eliminate vibrations from the PSU:



On my testbench that incorporates a ASUS P7P55D Evo motherboard, I had full access to the CPU cooler backplate:




Here is a closer look on the 5.25’’ covers:




After the 5.25’’ cover removal, we can install the optical drive or any other device that was designed for such a space: