The SilverStone Alta G1M is a well-ventilated pc case that supports fanless CPU coolers. The case measures 20.0 x 12.1 x 7.9 inches (HxLxW). It is compatible with Micro ATX motherboards. There are 4 standard size PCIe slots for expansion cards. The side of the case has a power on/off button, reset button, two USB 3.0 Type A ports, one USB 3.1 Type C port, and an audio in/out jack. It is compatible with internal SFX power supplies.