PC Case Cooler Master Elite 681 (E681-KHNN-S00) ATX Midi Tower, Black, 1×3.5 inch + 2×2.5 inch, 2×USB 3.0, 4×120mm ARGB, Tempered Glass Side

Cooler Master Elite 681 (E681-KHNN-S00) is an ATX midi tower PC case in black designed to accommodate standard ATX motherboards and mainstream gaming or workstation components. The chassis includes mounting for one 3.5" drive and two 2.5" drives, front-panel access with two USB 3.0 ports, four preinstalled 120mm ARGB fans for customizable lighting, and a tempered glass side panel that provides a clear view of internal components while supporting airflow-oriented layouts. The power supply is not included, allowing choice of compatible PSUs to match system requirements.

Advantages

The case combines practical component compatibility with visual presentation: the tempered glass side panel makes it easy to showcase hardware and cable management, while four 120mm ARGB fans deliver active airflow and address cooling needs for mid-range to high-performance builds. Front I/O with dual USB 3.0 ports simplifies connection of external storage and peripherals. The interior supports common drive sizes and provides a straightforward layout for installation and cable routing.

Suitable for

• Gaming PC builds requiring visible components and active cooling
• Home or office workstations with ATX motherboards
• Enthusiast builds where ARGB lighting is desired
• Systems that need multiple storage drives (1×3.5" + 2×2.5")

Key specifications

• Form factor: ATX midi tower
• Colour: Black
• Drive bays: 1×3.5" and 2×2.5"
• Front I/O: 2×USB 3.0 ports
• Cooling: 4×120mm ARGB preinstalled fans
• Side panel: Tempered glass
• PSU: Sold separately (standard ATX compatible)

How to use

Install the ATX motherboard into the case using the provided standoffs and secure it with screws. Mount storage drives into the appropriate 3.5" or 2.5" bays and connect power and data cables. Position and connect the power supply unit in the designated area; ensure the PSU is compatible with the case dimensions and connectors. Connect the front-panel connectors, including the two USB 3.0 ports and ARGB fan headers, to the motherboard according to the motherboard manual. Route cables behind the motherboard tray for improved airflow and close the tempered glass side panel once all components are secured.

Recommendations

If adding additional cooling or replacing the included fans, ensure ARGB headers and fan connectors match your motherboard or controller; verify radiator and GPU clearance before final assembly. Regularly clean dust filters and internal surfaces to maintain airflow and cooling performance.