QUBE 340/ Q300L V3 The QUBE 340 / Q300L V3 is a compact Micro-ATX PC case designed for serious performance. Engineered with Cooler Master's Thermal Excellence, it maximizes airflow to keep your system cool and stable - even with high-TDP components. Designed to accommodate longer GPUs and taller air coolers, it provides rigidity and efficient layouts with optimized airflow. Remove Product? POWERFUL COOLING CAPABILITY High-airflow front panel and support for multiple fan and radiator keeps systems running cool and smooth. PERFORMANCE IN PERFECT FIT Provides generous components clearance to enable high-performance, compact builds. ACCESS MADE EASY Position the I/O panel on the top or bottom to keep connections within easy reach. FLEXIBLE ORIENTATIONS Whether vertical or horizontal, tailor builds to fit any space, setup, and workflow. SPECIFICATIONS - QUBE 340（Default Version） PRODUCT SPECIFICATIONS - Q300L V3（Lite Version） Downloads Product Sheet About Us Support Join Us Resource Center
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Drive Bays - 3.5"
1
Drive Bays - 5.25"
NA
Fans Support - Top
2 x 120 mm / 2 x 140 mm
Fans Support - Rear
1 x 120 mm / 1 x 140 mm
Motherboard Support
Mini-ITX, Micro-ATX
Fans Support - Front
2 x 120 mm / 2 x 140 mm
Included Accessories
1 x Filter / 1 x Holder | N/A
Power Supply Support
ATX
Fans Support - Bottom
1 x 120 mm / 1 x 140 mm
I/O Panel - USB Ports
2 x USB 3.2 Gen1 Type-A; 1 x USB 3.2 Gen 2x2 Type-C
Radiator Support - Top
240 / 120 mm
Clearances - CPU Cooler
178 mm
Radiator Support - Rear
120mm | 120 mm
Radiator Support - Front
240 / 120 mm
Clearances - Power Supply
200 mm (without bottom fan installed); 140 mm (with bottom fan installed)
Pre-installed Fans - Rear
1 x 140 mm non-ARGB Black
Radiator Support - Bottom
N/A
Clearances - Graphics Card
366 mm (without front fan installed)
I/O Panel - Audio In / Out
1 x 3.5 mm Mic / Audio Combo Jack
Drive Bays - 2.5" Drive Bay
2 (max 4)
Cable Routing (Behind MB Tray)
30mm | 30 mm
Drive Bays - 3.5" / 2.5" Combo
1
Fans Support - Side (Left/Right)
NA
Radiator Support - Side (Left/Right)
N/A
Dimension (L x W x H) - Excl. Protrusions
374 x 230 x 374 mm
Dimension (L x W x H) - Incl. Protrusions
386.1 x 230 x 429.4 mm | 386.1 x 230 x 388.5 mm
Dimension (L x W x H) - Volume (Excl. Protrusions)
32.17 L
Dimension (L x W x H) - Volume (Incl. Protrusions)
