Cooler Master

Cooler Master Q300L V2 Micro-ATX Tower

Name: Cooler Master Q300L V2 Micro-ATX Tower, Magnetic Patterned Dust Filter, USB 3.2 Gen 2x2 (20GB), Tempered Glass, CPU Coolers Max 159mm, GPU 360mm
Brand: Cooler Master
SKU: B0CB8WGGNW

Status: Cooler Master Q300L V2 Micro-ATX Tower: Unavailable on Amazon as of 2026-10-18 10:24 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The Cooler Master Q300L V2 Micro-ATX Tower: Fits graphics cards up to 360mm long in a Micro-ATX footprint; main trade-off: no standard ATX motherboard support, only Micro-ATX and Mini-ITX.

Unavailable on Amazon as of 2026-10-18 10:24 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

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Similar: Cooler Master Q300L V3 Micro-ATX PC Case — $55.49 on Amazon as of 2026-10-20 20:20 UTC (price may vary).

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Original listing (currently unavailable) → Compare to similar pc cases

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-18

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Fits graphics cards up to 360mm long in a Micro-ATX footprint
✓ Clears CPU air coolers up to 159mm tall
✓ Mounts a 240mm liquid cooler plus up to 5 case fans
✓ 28mm of routing space behind the motherboard tray for cable management
✓ Magnetic patterned dust filter and a front USB 3.2 Type-C port

Cons

✗ No standard ATX motherboard support, only Micro-ATX and Mini-ITX
✗ Radiator support listed at 240mm, with no 280mm or 360mm AIO stated
✗ 159mm cooler limit rules out some tall dual-tower air coolers
✗ Front USB-C port needs a matching USB-C header on the motherboard

Manufacturer description

The Cooler Master Q300L V2 is a compact Micro-ATX tower with room for full-size hardware. It takes Micro-ATX and Mini-ITX motherboards, graphics cards up to 360mm long and CPU air coolers up to 159mm tall, so a small footprint can still hold a high-end GPU. The case is built for airflow. Perforated front, top and bottom panels pull air through the chassis, and you can fit a 240mm liquid cooler plus up to five case fans. The redesigned patterned dust filter is magnetic, so it lifts off for cleaning and goes back on without fasteners. The V2 refresh adds a front USB 3.2 Type-C port, which the…

SpecPicks Verdict

SpecPicks scored Cooler Master Q300L V2 Micro-ATX Tower using a rating × review-volume × price-fit model applied to published specs and reviews across the pc cases category. Cooler Master's pc cases lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for pc cases of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will a full ATX motherboard fit in the Cooler Master Q300L V2?

No. The Q300L V2 supports Micro-ATX and Mini-ITX motherboards only. It does support a standard ATX power supply, so you are not limited to SFX units.

What is the longest graphics card the Q300L V2 can fit?

It fits graphics cards up to 360mm long, which leaves room for most high-end GPUs in a Micro-ATX build.

Can I install a 360mm AIO liquid cooler in this case?

Cooler Master lists support for a 240mm liquid cooler, and no 360mm radiator support is stated. If you use an air cooler instead, it can be up to 159mm tall.

What do I need to use the front USB-C port?

The listing title specifies a USB 3.2 Gen 2x2 (20Gbps) front port, while the product description calls it USB 3.2 Gen 2 Type-C. Either way, your motherboard needs a matching front-panel USB-C header. Check your board manual before you buy.

How many case fans does the Q300L V2 support?

It supports up to 5 case fans alongside a 240mm liquid cooler, and its perforated front, top and bottom panels feed them air. Check the product listing for how many fans come pre-installed.

Key Features

Motherboard Compatibility – Supports Micro-ATX and Mini-ITX motherboards with a spacious interior for easy installation, improved cable management, and future upgrade flexibility.
GPU Compatibility – Supports graphics cards up to 360mm, providing ample room for high-end GPUs and next-gen performance upgrades for gaming or workstation builds.
Versatile Cooling – Equip with a 240mm liquid cooler and up to 5 case fans, ensuring strong airflow, improved heat dissipation, and stable performance during intensive gaming sessions.
Open Thermal Design – The perforated front, top, and bottom design ensures optimal thermal airflow, promoting excellent heat dissipation throughout the system.
Routing Space – With a substantial 28mm of space available behind the motherboard tray, you can effectively manage cables, resulting in a tidy and organized build.

Full Specifications

Brand	Cooler Master
Color	Black
Fan Size	240 Millimeters
Material	Metal, Plastic, Tempered Glass
Case Type	Mini-Tower
Model Name	Q300L V2 Black
Unit Count	1.0 Count
Connectivity	USB
Model Number	Q300LV2-KGNN-S00
Cooling Method	Air
Item Type Name	Gaming Case
Number of Fans	5
Mfr Part Number	Q300LV2-KGNN-S00
Total Usb Ports	2
Antenna Location	Business, Gaming
Compatible Devices	CPU Coolers Max Height 159mm, GPU Max Length 360mm, Micro-ATX Motherboards, Mini-ITX Motherboards, Up to 240mm Liquid Cooler
Enclosure Material	Metal, Plastic, Tempered Glass
Total USB 2.0 Ports	2
Total USB 3.0 Ports	1
Warranty Description	2 Years
Full listing title	Cooler Master Q300L V2 Micro-ATX Tower, Magnetic Patterned Dust Filter, USB 3.2 Gen 2x2 (20GB), Tempered Glass, CPU Coolers Max 159mm, GPU 360mm, Fully Ventilated Airflow (Q300LV2-KGNN-S00)

Ready to buy?

Amazon shows no buyable offer for Cooler Master Q300L V2 Micro-ATX Tower at the last check. A similar in-stock product is Cooler Master Elite 690 Wood ATX Mid-Tower PC Case. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $94.99