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Cooler Master Q300L V1 Micro-ATX PC Case, High Airflow, Transparent Panel9.0Our score 4 photos
CMBrandCooler MasterCMCooler Master7 products in our catalogSee all Cooler Master products →ID DBD-17696

Cooler Master Q300L V1 Micro-ATX PC Case, High Airflow, Transparent Panel

9.0/10 our score 4.5 (14,012 ratings on Amazon)

Ample Interior: Explore ample interior space for Micro-ATX or Mini-ITX motherboards, ensuring easy and future expansion

Supported MotherboardMicro-ATX and Mini-ITXTotal USB 3.0 Ports2Hard Disk Form Factor3.5 inches

About this item

  • Ample Interior: Explore ample interior space for Micro-ATX or Mini-ITX motherboards, ensuring easy and future expansion
  • Components Clearance: Accommodates CPU coolers with a max height of 159mm, GPU cards up to 360mm, and PSU up to 160mm in length.
  • Versatile Cooling: Maximize cooling performance with a 240mm liquid cooler and 5 fans.
  • Modular I/O Panel: You have the flexibility to adjust its position at the front, top, or bottom on both sides
Category: PC Parts › Computer CasesRanked #99 of 616 in PC Parts
9.0Our score
Our verdict

Ample Interior: Explore ample interior space for Micro-ATX or Mini-ITX motherboards, ensuring easy and future expansion

Ranked #99 in PC Parts · 4 things we like

Quick answer The Cooler Master Q300L V1 Micro-ATX PC Case scores 9.0/10 with us. Amazon owners rate it 4.5 out of 5 across 14,012 reviews, in line with the 4.5 average of the 40 computer cases we track. It was listed at $39.99 on Amazon when we last checked in September 2026. Key facts: supported motherboard Micro-ATX and Mini-ITX, total usb 3.0 ports 2, hard disk form factor 3.5 inches.

The Master Box Q300L is your straightforward option in the lineup of the brand new Master Box Series from Cooler Master. A Series that might be small in size but excels in functionality and modularity without compromising on the thermal performance. Although the size wouldn't tell, the Master Box Q300L supports a standard ATX PSU which we don't see often in the market with this size.

Based on the different system setup, the I/O panel can be adjusted to six different locations, three options at each side of the case. You can decide which setup fits your system best. Due to the cube design of the frame and special pattern design on the magnetic dust filter will make the chassis stand out from the rest.

The combination of a practical design and the unique customizable outlook makes the Master Box Q300L The perfect choice for office and home.

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Product information

24 specifications
Supported MotherboardMicro-ATX and Mini-ITX
Case TypeMini-Tower
Power Supply Mounting TypeBottom Mount
Cooling MethodAir
Total Expansion Slots Quantity4
Total USB 3.0 Ports2
Total Usb Ports2
Other Special Features of the ProductAccomodates CPU Coolers, Adjustable, Dust Filter, Edge-To-Edge Panel, Fully Ventilated
Hard Disk Form Factor3.5 inches
Internal Bays Quantity1
Compatible DevicesMicro-ATX and Mini-ITX motherboards, Cooler Master devices
Number of Fans3
Power Supply Maximum Output500 watts
ColorDark Gray
Enclosure MaterialAlloy Steel, Plastic
Antenna LocationGaming
BrandCooler Master
Model NameQ300L
Item Highlight360mm Graphics Card Support, 240mm AIO Support, Micro-ATX Motherboard, Magnetic Dust Filters, Modular I/O Panel
Number of Items1
Global Trade Identification Number00884102038006, 00884102095313, 04719512065488
Built-In Media1 computer case
Item Type Namegrocery
Model NumberMCB-Q300L-KANN-S00

Pros & cons

What we like
  • Ample Interior: Explore ample interior space for Micro-ATX or Mini-ITX motherboards, ensuring easy and future expansion
  • Components Clearance: Accommodates CPU coolers with a max height of 159mm, GPU cards up to 360mm, and PSU up to 160mm in length.
  • Versatile Cooling: Maximize cooling performance with a 240mm liquid cooler and 5 fans.
  • Modular I/O Panel: You have the flexibility to adjust its position at the front, top, or bottom on both sides
What could be better

    Cooler Master Q300L V1 Micro-ATX PC Case: questions & answers

    Is the Cooler Master Q300L V1 Micro-ATX PC Case worth buying?

    Yes, it is one of the stronger picks in its group. We score the Cooler Master Q300L V1 Micro-ATX PC Case 9.0 out of 10. Amazon owners rate it 4.5 out of 5 across 14,012 reviews, in line with the 4.5 average of the 40 computer cases we track.

    How much does the Cooler Master Q300L V1 Micro-ATX PC Case cost?

    It was listed at $39.99 on Amazon when we last checked in September 2026. That is cheaper than the $73.12 median for computer cases in our catalog. Amazon prices change daily, so use the price button on this page to see the current figure.

    What are the key specs of the Cooler Master Q300L V1 Micro-ATX PC Case?

    Supported Motherboard: Micro-ATX and Mini-ITX; Total USB 3.0 Ports: 2; Hard Disk Form Factor: 3.5 inches. All 24 specifications are in the product information table on this page.

    What are good alternatives to the Cooler Master Q300L V1 Micro-ATX PC Case?

    Similar, well-rated computer cases in our catalog: Cooler Master HAF II 500 ATX PC Case (9.4/10, 4.7 stars from 21 owners); LIAN LI High Airflow ATX PC Case (9.0/10, 4.5 stars from 169 owners); TGDGAMER MATX Micro ATX Case (8.0/10, 4.0 stars from 401 owners).

    Cooler Master HAF II 500 ATX PC CaseLIAN LI High Airflow ATX PC CaseTGDGAMER MATX Micro ATX Case