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Cooler Master MasterBox MB520 Gaming Case - Black

CCL Code: CAS3445
Manufacturer Code: MCB-B520-KANN-S00
Manufacturer: Cooler Master
Cooler Master MasterBox MB520 Gaming Case - Black

Key Features:

  • PSU not included
  • 0 x 5.25" External Bay(s)
  • 4 x 2.5", 2 x 3.5" HDD Bay(s)
  • Max MB Size: ATX

Delivery Options (from £3.95)

Tomorrow via DPD Saturday

Wednesday 2nd December via Standard Delivery

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Collection Options

Today from CCL (BD11 2PS)

Monday 30th November from Local Collection Point

Was £52.99

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8 In Stock Now

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The MasterBox MB520 focuses on aesthetics and showmanship with a fully transparent front panel. For rigs built with lighting as a concentration, the front panel offers a transparent view through the panel while having the aggressive intakes to ensure airflow.

The aggressive ventilation on the DarkMirror front panel cools the system while the ventilation on the top panel offers additional thermal support.

Building a gaming rig is a process that evolves in components over time. To align with the pace of technology, interior clearances have ample space to support future component upgrades. The chassis and PSU shroud are powder-coated in black to help compliment your build while the edge-to-edge transparent side panel shows it off.


  • Max GPU Length: 410mm
  • Max CPU Cooler Height: 165mm
  • Max PSU Depth: 180mm
  • Cable Routing Space: 19 ~ 27mm

Main Features

  • DarkMirror Front Panel - Shade light through a transparent, tinted front panel.
  • Aggressive Intakes - Large intakes on each side of the front panel let the system breathe easy.
  • Edge to Edge Transparent Side Panel - Showcase your build through the transparent side panel.
  • Support for a total of 6 fans & water cooling - Six 120mm fans and front and rear water cooling support ensure that you don't have to compromise on performance.
  • Graphics card support up to 410mm - You won't ever have to worry about the fit of your graphics card, with support for even the largest, widest cards.
  • Storage Trays & PSU Shroud - GFX cables can be routed directly through the PSU shroud rubber grommet. The storage trays, hidden in the PSU shroud, can mount an SSD and HDD simultaneously.
  • Top Panel Ventilation - Filtered ventilation on the top panel has been added for thermal support.

User Controls

User Controls Power


Internal Expansion Bays 4 x 2.5"
2 x 2.5"/3.5" Combo


Expansion Slots 7 x Full Height


USB Ports 2 x USB 3.0
Headphone Ports 1 x 3.5mm Jack
Microphone In Port 1 x 3.5mm Jack


Cooling System Front: Supports 3 x 120mm or 2 x 140mm fans
Top: Supports 2 x 120mm or 140mm fans
Rear: Supports 1 x 120mm fan (included)
Power Supply ATX Power Supply supported


Form Factor Mid Tower Case
Case Colour Black with Red Trim
Material Steel
Motherboard Compatibility ATX (up to 272mm wide)
Width 217 mm
Depth 496 mm
Height 468 mm
Weight 5.34 kg

Key Features

Firewire No
Main Colour Black
Case Type Tower
USB 3.0 Support Yes
Case Form Factor Mid Tower
Power Supply Included No
Optimised for Gaming
80Plus Rated No
PSU Form Factor ATX
Display Model in Showroom No
L.E.D Fan No LED
Internal 3.5" Bay 2
Internal 2.5" Bay 4
Micro-ATX No
Cooler Height 165 mm
Built-in Card Reader No
USB Type-C Support No
Front HDMI No
Side Panel Type Windowed
GPU Length 410 mm
PSU Depth 180 mm
Front Audio Type Separate
Maximum Motherboard Size Supported ATX


Warranty 1 Year

Item Details

Manufacturer Cooler Master
Manufacturer Code MCB-B520-KANN-S00
EAN 4719512073469
UPC 884102045950
Condition New

Warranty Information

Warranty 1 Year

Manufacturer Information

Manufacturer Cooler Master
Manufacturer Code MCB-B520-KANN-S00

Do you have you a question about the Cooler Master MasterBox MB520 (ATX/Micro-ATX/Mini-ATX) Mid Tower Computer Case (Black with Red Trim)?

5 / 5 2 reviews

Krzysztof S

5 months ago

Cena i jako bardzo na ok. Jedynie to zamiast plastikowego okna mogo by by szklane i do tego ciko wciska gniazda usb ciko spasowane

Mr Michael Mitchell

July 2019

The case is excellent, and good build quality , it will fit any graphics card , or motherboard. But the only gripe is the lack of USB ports. But you can install a USB card like I did. Other than that it is a great case and good value for money , highly recommended

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