10 drive bays 3 x 5.25 5 x 3.5 2 x 2.5 Motherboards Standard ATX micro ATX Mini-ITXMaximum graphics card length 10.5 266 mm Maximum CPU cooler height 6.1 155 mm Cooling system 1 x 120 mm top exhaust fan 1 x 120 mm rear exhaust fan 1 x 120 mm side intake fan optional 1 x 120 mm front intake fan optional 1 x 120 mm 140 mm bottom fan optional 7 expansion slots Maximum-sized CPU cutout Water cooling support rear water cooling grommets support 0.5-inch tubes Bottom-mounted power supply with intake filter Front IO ports 2 x USB (Universal Serial Bus) 3.0 with included USB (Universal Serial Bus) 2.0 adapter Audio In Out No power supply included For new builders & seasonal system integrators alike everyone will find something to like in Antecs One. This enclosure is stocked with features any builder will value at an attractive price. Ample cooling USB (Universal Serial Bus) 3.0 tool-less 5.25 & 3.5 drive bays & bottom-mounted PSU intake with air filter. So that you can put your PC together with ease & get to the fun stuff. If youre looking for high quality PC essentials at an affordable cost then this enclosure is the One for you.