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Cooler Master ATX MasterBox MB520 RGB Case (No PSU) MCB-B520-KGNN-RGB

Web ID: 25639

MasterBox MB520 RGB, Tempered Glass Window, 3x RGB LED Fans, RGB Controller and Splitter Cable included, Support Motherboard RGB Sync
Manufacturer Warranty: 1 Year
Manufacturer PN: MCB-B520-KGNN-RGB
GTIN: 884102047473
Manufacturer Website


Darkmirror Front Panel

Shade light through a transparent, tinted front panel.

Performance Intake

Performance Intake

Large intakes on each side of the front panel let the system breathe easy.

RGB Led Fans And Lighting Control

RGB Led Fans And Lighting Control

Three 120mm RGB LED fans in front are pre-installed to create an amazing lighting effect.
One RGB controller is included in the accessory pack. If your motherboard does not support the RGB control function, you can connect the RESET button and control the RGB lighting directly from the I/O panel.

Excellent Thermal Performance

Optimized airflow due to the large intakes on each side of the front panel.
Additional ventilation on the top panel adds thermal support.

Fan And Radiator Support

Front: Three 120mm or two 140mm* fans and up to a 360mm radiator with a maximum thickness of 50mm without fans.
Top: Two 120mm or two 140mm fans and supports a 120mm or a 240mm radiator.
Rear: One 120mm fan or radiator. All to ensure you don’t have to compromise on performance.

* 2 x 140mm fans in front can only be mounted behind the front plate

Edge-to-edge Tempered Glass Side Panel

Edge-to-edge Tempered Glass Side Panel

Showcase your build and system lighting effect through the 4mm-thick tempered glass side panel. The side panel bracket hinges on an angle during removal, while two "captive" screws are held in place with rubber so they are not misplaced.

GFX Cable Routing

GFX Cable Routing

Conveniently route the graphics card cable through the PSU shroud grommet.

Expanding The Possibilities

The spacious interior fits all standard motherboards for your gaming needs.

Main Components Clearance

The MB520 RGB case supports CPU Coolers up to a height of 165mm, Graphic Cards up to a length of 410mm, and Power Supplies up to a length of 180mm.

Model Number
Available Color(s)
Steel, Tempered Glass, Plastic
Dimensions (LxWxH)
496(L) x 218(W) x 468(H)mm
Motherboard Support
ATX, Micro ATX, Mini ITX
Expansion Slots
2.5" / 3.5" Drive Bays (combo)
2.5" Drive Bays
4 (Max.6)
I/O Panel
2x USB 3.0, Audio In & Out (supports HD audio)
RGB Control
RGB controller included, 1 to 3 RGB splitter cable included
Pre-installed Fans - Front
3x 120mm RGB Fan
Pre-installed Fans - Rear
1x 120mm (Black)
Fan Support - Front
3x 120mm, 2x 140mm
Fan Support - Top
2x 120mm, 2x 140mm
Fan Support - Rear
1x 120mm
Radiator Support - Front
120mm, 140mm, 240mm, 280mm, 360mm
Radiator Support - Top
120mm, 240mm
Radiator Support - Rear
Clearance - CPU Cooler
Clearance - GFX
Clearance - PSU
Cable Routing - Behind Motherboard Tray
19-27mm / 0.74-1.06"
Dust Filters
Front, Bottom, Top
Power Supply Support
Bottom mount, ATX
EAN Code
UPC Code
MasterBox Series
Mid Tower