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Thermaltake Core V21 Black Extreme Micro ATX Cube Chassis CA-1D5-00S1WN-00

+ $10 off w/ promo code TTNVSAL55293D, limited offer

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In stock. Limit 10 per customer.
Ships from United States.
  • V1
  • V21
  • V71
  • V200
  • V250
  • V250 Air
  • V100
  • V150
  • SPCC Extreme Micro ATX Cube Chassis
  • 2 x USB 3.0, 1 x Headphone, 1 x Mic Ports Front Ports
  • 3 x 2.5"/3.5" Internal 3.5" Drive Bays
Core V21

Thermaltake Core V21 Micro Chassis

As the latest addition to the Core V Series, the new Thermaltake Core V21 is a quadrate micro M-ATX-based chassis that offers an endless stackable and flexible thermal solution. It allows externally-modular upgrades for enthusiasts to create dual systems. Designed for use in either a vertical or horizontal orientation on the motherboard, users can customize the chassis for the best viewing presentation. A 200mm fan on the front panel ensures that the Core V21 delivers outstanding cooling performance with compatibility for extensive DIY/AIO LCS, further enhancing the reputation that the air cooling units of the series has become renowned for. Guaranteed to be an immensely powerful system, the Core V21 also has the ability to accommodate various overclocking components to boost performance even further where it counts!

Core V21

Vertical or Horizontal Motherboard Placement

The Core V21 is designed for use in either a vertical or horizontal orientation on the motherboard. Built for customization that reflects the enthusiast's personality, it allows for adjustments to the chassis for the best viewing presentation while ensuring outstanding cooling performance. A removable PSU dust filter is embedded in the bottom panel of the chassis. Additionally, shockproof rubber gaskets on the PSU bracket help to minimize noise during operation.

Core V21

Stackable and Flexible Thermal Solution

With its endless stackable design, the Core V21 is in a class above the rest. Virtually limitless utility is possible. It's the first expandable system that allows enthusiasts to incorporate externally-modular upgrades. Stacked together, the chassis opens up space to expand the liquid cooling system, the storage solutions, or even create dual systems, thereby allowing for a dedicated top/bottom set-up for pure cooling. The maximum radiator length supported is 600mm at the front of the stack.

Core V21

Remarkable Expansion

Designed for high-end gaming system compatibility, the Core V21's modular drive racks allow gamers to easily install up to six data storage devices, a dual expansion slot VGA up to 350mm in length, and a tower CPU cooler up to 185mm in height. Even with a high-wattage PSU of up to 200mm in length, there's still plenty of space available for cable management. Moreover, two 240mm radiators can be installed on top of the chassis, delivering superior cooling performance.

Core V21

Optimized Ventilation

With its exceptional cooling ability, the Core V21 offers various mounting points to support all types of cooling systems, including DIY/AIO liquid-cooling systems and air-cooling units. A large 200mm fan is preinstalled on the front to guarantee that any type of gaming system can be accommodated.

Core V21

Chambers Concept

The Core V21 is optimized for space management. It is divided into two main chambers: the upper chamber is made for cooling performance and efficiency, while the lower one is made for PSU and drive bays. Thanks to the removable 2.5"/3.5" drive device racks, there is plenty of flexibility to gain the maximum interior space when needed for advanced cooling performance or liquid systems build.

Core V21

Tt LCS Certification

Tt LCS Certified is a Thermaltake exclusive certification applied to only products that pass the design and hardcore enthusiasts standards that a true LCS chassis should be held to. The Tt LCS certification was created so that we at Thermaltake can designate to all power users which chassis have been tested to be best compatible with extreme liquid cooling configurations to ensure you get the best performance from the best features and fitment.

Core V21 Radiator Supporting List

Core V21 Fan Supporting List

Core V21

Core V Series Comparison Chart

  This Product  
Product Information    
Model Core V21 Core V1
P/N CA-1D5-00S1WN-00 CA-1B8-00S1WN-00
Side Panels Window Window / Perforated
Color Black Black
Motherboard Supported 6.7" x 6.7" Mini-ITX
9.6" x 9.6" Micro ATX
6.7" x6.7" Mini-ITX
Form Factor Micro Case Mini Case
Height 336mm/13.2" 276mm/10.9"
Width 320mm/12.6" 260mm/10.2"
Depth 424mm/16.7" 316mm/12.4"
Expansion Slots 5 2
Internal Drive Bay 3 x 3.5" / 2.5" 2 x 3.5"/ 2 x 2.5"
External Drive Bay No No
I/O Ports    
USB 3.0 2 2
USB 2.0 N/A N/A
HD Audio / Fan Controller Yes/No Yes/No
Top 4 x 120mm or
2 x 140mm
Front 1 x 120mm or
1 x 140mm or
1 x 200mm
1 x 120mm or
1 x 140mm or
1 x 200mm
Rear 1 x 120mm or
1 x 140mm
2 x 80mm
Bottom 2 x 120mm -
Side 2 x 120mm or 2 x 140mm
(Left and Right)
Radiaror Supports    
Top 2 x 120/240mm
or 1 x 140/280mm
Front 1 x 120/240mm
or 1 x 140/mm
1 x 120mm or
1 x 140mm
Rear 1 x 120mm -
Bottom 1 x 120/240mm -
Side 1 x 120/240mm
or 1 x 140/280
CPU Cooler Height 185mm 140mm
Graphic Card Length 350mm 255mm (Inner Chassis)
285mm(Outer Chassis)
ATX PSU Length 220mm 220mm
Stacking Yes N/A
M/B Rotation Placement Yes N/A

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Return Policies

    We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1, 2022 and December 25, 2022 you will have until January 31, 2023 to return your product. There's nothing additional that you have to do!
  • Return for refund until: January 31, 2023
  • Return for replacement until: January 31, 2023
  • This item is covered by's Extended Holiday Return Policy. Read full return policy for details.