Does this case have USB 3 on the front io ports ?

Yeah it has 2 USB 3 ports, An audio input and output jack and a reboot button (obviously an on/off button as well haha)

Would the Corsair Hydro H100 x 240 fit in this case??

Yes it does, I have fitted my Corsair Hydro H100i Platinum RGB on the top. There is plenty of room. You should have zero stress putting an AIO in there.

What size are the fans?

It has 3 fans, not one like the other person said. The description and images clearly say it has one at rhe rear and two on thw front panel. They are all 120mm

Does the case have room to comfortable mount a 3.5" HDD?

yes there is, in the back if you attach the included rubber feet then it is easy to attach a HDD and there is also room for 2 2.5mm HDD or SSD

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Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black

Product ID: 59059636

Details

Brand
Cooler Master
Case type
Mini-Tower
Colour
Black
Cooling method
Fan
Fan size
144
Material
Alloy Steel

🔄Modular I/O panel with 3 orientation options

🧲Magnetic dust filters for effortless cleaning

🌬️Supports up to 5 fans & 240mm liquid cooling

€ 173.15

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Master your space with the sleek, versatile Q300L — where style meets airflow mastery.

SHOWCASE YOUR BUILD - Edge-to-edge transparent side panel offers a crystal-clear view of your components.
360 CUSTOM COOLING - Multiple fan and radiator support for optimized airflow tailored to your setup.
CLUTTER FREE MASTERY - 28mm cable management space ensures a sleek, professional interior.
FLEXIBLE ORIENTATION - Rubberized thumbscrews let you position your mini tower vertically or horizontally with style.
EFFORTLESS CLEAN AIRFLOW - Magnetic patterned dust filters keep your build pristine without hassle.

The Cooler Master MasterBox Q300L is a compact mini-tower PC case crafted from durable alloy steel, featuring removable magnetic dust filters, a fully transparent side panel, and a modular I/O panel with three orientation options. It supports multiple cooling configurations including up to two 140mm fans or a 240mm radiator in front, plus additional fan mounts, while accommodating CPU coolers up to 159mm and GPUs up to 360mm. Designed for clean cable management and flexible placement, it’s perfect for professionals seeking a stylish yet functional chassis.

Specifications

ASIN	B0785GRMPG
Antenna Location	Video Games, Business, Multitasking
Best Sellers Rank	23,290 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 137 in Computer Cases
Box Contents	1 computer case
Brand Name	Cooler Master
Case Type	Mini-Tower
Colour	Black
Compatible Devices	ATX motherboard, ATX power supply, Micro-ATX motherboard
Cooling Method	Fan
Customer Reviews	4.5 4.5 out of 5 stars (13,684)
EU Spare Part Availability Duration	2 Years
Enclosure Material	Alloy Steel, Plastic
Fan Size	144 Millimetres
Global Trade Identification Number	00884102038006, 00884102095313, 04719512065488
Hard Disk Form Factor	144 Millimetres
Internal Bays Quantity	1
Item Dimensions D x W x H	41.1D x 21W x 41.1H centimetres
Item Type Name	MasterBox Q300L mATX Case w/Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Air Flow Performance by Cooler Master
Item Weight	480 Grams
Manufacturer	Cooler Master Europe B.V.
Manufacturer Part Number	MCB-Q300L-KANN-S00
Model Name	Q300L
Model Number	MCB-Q300L-KANN-S00
Number of Fans	3
Number of Items	1
Other Special Features of the Product	Magnetic Dust Filters
Power Supply Maximum Output	500 Watts
Power Supply Mounting Type	Top Mount
Product Warranty	2 years
Supported Motherboard	Mini ITX, Mini ATX
Total Expansion Slots Quantity	4
Total USB 3.0 Ports	2
Total USB Ports	2
UPC	884102095313 884102038006

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€ 173.15

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

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