PC Case Thermaltake Core V21 Cube Black

The Thermaltake Core V21 Cube Black is a micro M-ATX cube chassis that emphasizes flexible cooling and modular expansion. It supports vertical or horizontal motherboard installation, a front 200 mm fan for strong airflow, removable drive racks for 2.5"/3.5" devices, and a bottom-mounted PSU with a removable dust filter. The stackable design enables externally modular upgrades and allows users to expand liquid cooling, storage, or build dual systems with up to 600 mm radiator support in a stacked front configuration.

Advantages

The Core V21 offers a compact footprint with high cooling capacity thanks to a preinstalled 200 mm front fan and multiple mounting points for air and DIY/AIO liquid cooling. Its stackable, modular layout provides versatile system expansion, including space for long GPUs (up to 350 mm), tall CPU coolers (up to 185 mm) and multiple radiators. Removable drive racks and a dedicated lower chamber for PSU and drives improve interior space management and cable routing.

Suitable for

• Micro ATX gaming PCs requiring strong airflow
• Compact workstation builds with multiple storage drives (2.5"/3.5")
• Custom liquid-cooling setups and dual-system configurations

Key specifications

• Form factor: Cube, supports Mini-ITX and Micro ATX
• Front fan: 1×200 mm preinstalled
• Supported GPU length: up to 350 mm (dual expansion slot)
• CPU cooler height: up to 185 mm
• PSU length support: up to 200 mm
• Drive bays: up to three 3.5" and three 2.5" (removable racks)
• Maximum front stacked radiator length: up to 600 mm
• I/O: 2× USB 3.2 Gen 1 Type-A
• Material: SPCC; Colour: Black; Weight: 6.5 kg

How to use

Install a Mini-ITX or Micro ATX motherboard in either vertical or horizontal orientation according to preferred presentation. Mount the PSU in the lower chamber and use the removable dust filter to maintain cleanliness. Configure drive racks for required 2.5" or 3.5" devices or remove them to free interior space for larger cooling components. Connect the front-panel USB ports to the motherboard and route cables through the lower chamber to keep the upper chamber clear for airflow and radiator installation.

Recommendations

For optimal cooling, keep the chassis in a stackable arrangement with adequate clearance at the front for airflow. When installing high-wattage PSUs or multiple radiators, remove unnecessary drive racks to improve circulation and make use of the preinstalled 200 mm fan plus additional fan/radiator mounting points for balanced intake and exhaust.