MasterBox Q300L, Micro-ATX/Mini-ITX, USB 3.0, Steel/Plastic, Black
The MasterBox Q300L is your straightforward option in the lineup of the brand new MasterBox Q-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 MasterBox 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 dust filter will make the chassis stand out from the rest. The combination of a practical design and the unique customizable outlook makes the MasterBox Q300L the perfect choice for office and home usage.
| Design |
| Maximum PSU length |
16 cm |
| Maximum graphics card length |
36 cm |
| Maximum CPU cooler height |
15.7 cm |
| LED indicators |
Yes |
| Cable management |
Yes |
| Anti-dust filter |
Yes |
| Side window |
Yes |
| Number of expansion slots |
4 |
| Number of 2.5" bays |
2 |
| Number of 3.5" bays |
1 |
| Supported motherboard form factors |
micro ATX, Mini-ITX |
| Product colour |
Black |
| Material |
Plastic, Steel |
| Type |
PC |
| Form factor |
Midi Tower |
| Power supply |
| Supported power supply form factors |
ATX, PS2 |
| Power supply location |
Bottom |
| Power supply included |
No |
| Ports & interfaces |
| Audio output |
Yes |
| Audio input |
Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity |
2 |
| Cooling |
| Rear radiator sizes supported |
120 mm |
| Front radiator sizes supported |
120,240 mm |
| Liquid cooling capability |
Yes |
| Cooling |
Yes |
| Bottom fans diameters supported |
120 mm |
| Number of bottom fans supported (max) |
1 |
| Top fans diameters supported |
120 mm |
| Number of top fans supported (max) |
2 |
| Rear fans diameters supported |
120 mm |
| Number of rear fans supported (max) |
1 |
| Rear fans installed |
1x 120 mm |
| Front fans diameters supported |
120,140 mm |
| Number of front fans supported (max) |
2 |
| Storage |
| Supported HDD sizes |
2.5,3.5" |
| General |
| Product Family |
MasterBox |
| Weight & dimensions |
| Weight |
3.7 kg |
| Height |
378 mm |
| Depth |
387 mm |
| Width |
230 mm |
| Packaging data |
| Package weight |
4.7 kg |
| Package height |
461 mm |
| Package depth |
435 mm |
| Package width |
276 mm |
| Logistics data |
| Harmonized System (HS) code |
84733080 |

Have you ever thought of trading in your old smartphone?
Recycling your phone is a great way to help the environment and earn some extra money, and Clove Technology offers a recycling programme that pays you for your old phone(s)!
So if you're about to buy a new phone from us, or you've recently bought one, why not sell us the handset you no longer need?
How much will you offer for my phone?
That depends on its age and condition. More recent phones generally have a higher value than old ones, but other factors can affect value. These include if the phone is working or not and its network lock status. Fully working phones with an unlocked network status will command a higher value if they are in good condition.
We pledge to beat the major recycling services operating in the UK on the price they offer for your
How do I get my phone(s) back to you?
On our recycling site SEARCH, for your phone and provide details of its status and condition. We will then offer you a price for your phone. If you choose the option to Sell Now, a recycling pack to you for returning your phone.
Alternatively, you can call our recycling team on 0330 1180686, choosing option 2.