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Moonstone mid-tower case with tempered glass panel and mesh front

Cooler Master

Cooler Master Q540-LGNN-S00 QUBE 540 ATX Mid-Tower PC Case Moonstone

SKU CH-DCH1-8CSV2 MPN Q540-LGNN-S00

Mid-tower chassis supporting ATX, E-ATX up to 280 mm and GPUs to 415 mm with reversible I/O, movable handles and tempered glass panel

  • ColorMoonston
  • Case MaterialSteel / Tempered Glass
  • Motherboard CompatibilityITX / M-ATX / ATX / *E-ATX(*Up to 280 mm)
  • Dust FiltersBottom / Front / Top
  • Internal 3.5" Drive Bays1
  • Internal 2.5" Drive Bays2

Size ATX

Color Moonstone

  • Modular interior with repositionable I/O panel and movable handles for flexible layout
  • Vertical or horizontal orientation supported by reversible I/O and portable handles
  • GPU clearance up to 415 mm without front fan for full-size cards
  • Motherboard support up to 11 inches wide E-ATX within compact ATX frame
  • Front USB 3.2 Gen2 Type-C and two Gen1 ports for fast connectivity

What the QUBE 540 Is

The Cooler Master QUBE 540 is a compact ATX mid-tower chassis built for horizontal or vertical use. A reversible I/O panel and movable handles let you reposition ports and grips to suit any desk or shelf layout.

Who This Suits and Who Should Look Elsewhere

Builders who want a small-footprint case that still fits full-size components will appreciate the modular interior and mesh front panel. Buyers who need more than one 3.5-inch drive bay or more than two 2.5-inch bays should consider a larger enclosure.

Max GPU Length 415 mm

The case accepts graphics cards up to 415 mm long when the front fan is removed, covering current flagship models such as RTX 5090 and RX 9070 XT. This single measurement decides whether your chosen card will fit.

Highlights

  • Modular interior with repositionable I/O panel and movable handles for flexible layout
  • Vertical or horizontal orientation supported by reversible I/O and portable handles
  • GPU clearance up to 415 mm without front fan for full-size cards
  • Motherboard support up to 11 inches wide E-ATX within compact ATX frame
  • Front USB 3.2 Gen2 Type-C and two Gen1 ports for fast connectivity

Specifications

BrandCooler Master
ModelQ540-LGNN-S00
ColorMoonston
Case MaterialSteel / Tempered Glass
Motherboard CompatibilityITX / M-ATX / ATX / *E-ATX(*Up to 280 mm)
Dust FiltersBottom / Front / Top
Internal 3.5" Drive Bays1
Internal 2.5" Drive Bays2
Expansion Slots7
Fan OptionsFront: 3 x 120mm / 2 x 140mm
Top: 140 / 280 / 360 mm (w/o I/O panel)
Rear: 140 / 280 / 360 mm (w/o I/O panel)
Bottom: 120 mm
Radiator OptionsTop: 140 / 280 / 360 mm (w/o I/O panel)
Front: 140 / 280 / 360 mm (w/o I/O panel)
Rear: 120 mm
Bottom: 140 / 280 / 360mm (w/o I/O panel)
Max GPU Length415 mm
Max CPU Cooler Height172 mm
Max PSU Length200 mm
Dimensions438.5 x 225 x 492.1 mm
Weight8.10kg
Shipping weight8.80 kg
Package size533 × 513 × 305 mm

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will a 415 mm graphics card fit without removing the front fan?

The 415 mm GPU clearance is measured without a front fan installed; fitting a front fan reduces the available length.

Can I mount a 360 mm radiator on the top while keeping the I/O panel in its default position?

Top 360 mm radiator support requires the I/O panel to be moved away from the top position.

Does the case support E-ATX motherboards wider than 280 mm?

E-ATX support is limited to boards up to 280 mm wide; larger E-ATX boards will not fit.

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