Coolermaster master case maker 5 usb30 atx case the new wave of case technology pioneered by our mastercase series crests with the unique freeform modular system which allows unparalleled flexibility to upgrade your case via the addition of top panels or doors adjusting aesthetics thermal performance and layout flexibility the mastercase maker 5 advances beyond the concept of a standard build by offering the option to completely swap and readjust the casersquos form and