3D Mercury, with built-in watercooling system, is not just a case! It offers a quick and beautiful way for power users to have extreme over-clocking experience. Water-tank Refill Ease Liquid-cooling System Ready Splitter Valves for Easy Upgrade Dual 12cm Cooling Fans for Radiator External coolant refill inlet located on top of the case for easy maintenance Built-in liquid cooling system with pump, radiator and tank all positioned to go Pre-installed splitter valves allowing users to easily upgrade liquid cooling system with more cooling blocks Automotive-grade radiator with dual 12cm high performance cooling fans Industrial Ruggedness MOSFET Cooling Water-flow Meter Water-level Meter Automotive-grade tubing and piping for longevity of use MOSFET cooling fan above CPU water-block adds additional cooling to motherboard components Water flow indicator with blue LED backlight, providing clear indication of whether water is flowing through the system Water level indicator with blue LED backlight, telling users when to refill GIGABYTE coolant Sleek Air-intake Ventilation Front Intake Vents Adjustable Fan RPM Component Protection Sporty side-intake liquid-cooling system ventilation dedicated to air intake of isolated water-cooling chamber Front filtered intake vents housing a 12cm large silent intake fan Fan revolutions per minute adjustable through the fan controller Sleek security lock on side panel to protect valuable computer components User-friendly and Elegant Design Extended Body Tool-free Chassis Cable-managed Interior Multi-media front I/O all located on top of the chassis for easy access Spacious interior of the chassis for extended upgradeability and airflow Tool-less installation of devices with clip-lock and lever mechanisms Interior cabling all clamped and managed to allow tidy looks and internal airflow