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Cooler Master QUBE 340 Black Q340KGNNS00
Qube 340 is a performance-ready mATX case designed for strong airflow and efficient cooling in a compact footprint. Built under Cooler Master's Thermal Excellence philosophy, it supports larger GPUs and taller coolers while maintaining easy installation. As part of the Qube 340 family, it features modular design elements like flexible I/O placement and multiple orientation options for a versatile build experience. Modular I/O Freedom: Place It Where You Want Top - Rear, Front - Top, Top - Front, and Front - Bottom. 3D-Printable Add-Ons: Customize your Qube 340 with a wide range of 3D-printable accessories, including compatible add-ons designed for the QUBE 540 ecosystem. Generous Component Clearance: Fit high-performance hardware in a compact build with support for graphics cards up to 366 mm, including RTX 5080 | RX 9070 XT, and CPU air coolers up to 178 mm tall. Powerful Cooling Support: A high-airflow front panel and multiple fan and radiator mounting options help keep your system running cool and smooth. Compact Micro-ATX Design: Compact design that supports Micro-ATX and Mini-ITX motherboards with a footprint similar to a large LP record crate. Modular Handle Placement: Portable Handles Included: |
| Motherboard Supported: | Mini ITX |
| Motherboard Supported: | Micro ATX |
| Number of Fans Supported: | 6 |
| Fan Supported Details: | Fans Support Top| 2 x 120mm / 2 x 140mm Fans Support Front| 2 x 120mm / 2 x 140mm Fans Support Rear| 1 x 120mm / 1 x 140mm Fans Support Bottom| 1 x 120mm / 1 x 140mm |
| Number of Fans Installed: | 1 |
| Fan Size Supported: | 4.72" |
| Fan Size Supported: | 5.51" |
| Installed Fan Size: | 5.51" |
| Installed Fan Size Details: | 1 x 140mm |
| Features: | Dust Filter |
| Features: | Compact |
| Features: | Carry Handle |
| Number of Internal 3.5" Bays: | 1 |
| Number of Internal 2.5" Bays: | 2 |
| Number of Internal 2.5"/3.5" Bays: | 1 |
| Number of Total Expansion Bays: | 4 |
| Total Number of Expansion Slots: | 4 |
| Total Number of USB Ports: | 3 |
| USB Port Details: | 2 x USB 3.2 Gen 1 Type-A |
| USB Port Details: | 1 x USB 3.2 Gen 2x2 Type C |
| Front USB: | Yes |
| Total Number of Audio In Ports: | 1 |
| Front Audio In: | Yes |
| Total Number of Audio Out Ports: | 1 |
| Front Audio Out: | Yes |
| Headphone/Microphone Combo Port: | Yes |
| Color Family: | Black |
| Product Color: | Black |
| Product Material: | Galvanized Cold Rolled Steel (SGCC) |
| Product Material: | Tempered Glass |
| Product Material: | Mesh |
| Cooler Type: | Fan Cooler |
| Form Factor: | Tower |
| Maximum CPU Cooler Height: | 7.01" |
| Maximum PSU Length: | 7.87" |
| Maximum GPU Length: | 14.41" |
| Height: | 14.7" |
| Width: | 9.1" |
| Depth: | 14.7" |
| Package Contents: |
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| Limited Warranty: | 2 Year |
![]() | WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov. |
- This item cannot be shipped to PO Boxes.
- This item can be shipped only within the U.S.
- UPC: 884102141430
- Mfr's Part #: Q340-KGNN-S00



















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