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Large black full-tower PC case with triple-sided tempered glass panels showing internal components

MSI

MSI MEG MAESTRO 900R PC case

SKU CH-TWY0-YCSCX MPN MEG MAESTRO 900R

Full-tower chassis with triple-sided tempered glass, a 4-way rotatable and detachable motherboard tray, vertical GPU mounting via PCIe Gen 5 riser, and front USB-C with 60W Power Delivery

  • TypeATX Full Tower
  • Motherboard CompatibilityATX / E-ATX / Micro ATX / Mini ITX
  • Internal 3.5" Drive Bays4
  • Internal 2.5" Drive Bays8
  • Expansion Slots8 (Horizontal) 3 (Additional Vertical)
  • Front Ports1 x USB 20Gbps (Type-C, PD 60W ) 4 x USB 10Gbps (Type-C) 4 x
  • Centered layout with triple-sided tempered glass showcases premium components from every angle
  • 4-way rotatable motherboard tray lets you pick orientation for airflow, cable routing and display
  • Detachable tray works as a test bench so core parts can be built and checked outside the case
  • Vertical airflow design supports up to 14 fans and dual 420 mm radiators for extreme cooling
  • PCIe Gen 5 riser cable enables vertical GPU mounting while front USB-C delivers up to 60 W power delivery

Centered showcase chassis

The MEG MAESTRO 900R is a full-tower case built around a centered system layout with triple-sided tempered glass. It accepts ATX, E-ATX, Micro-ATX and Mini-ITX motherboards and provides four 3.5-inch and eight 2.5-inch internal drive bays. The design targets builders who want gallery-like visibility of high-end components from multiple angles.

Vertical airflow and 60W USB-C PD

Pre-installed bottom fans use reverse blades to push air upward through the chassis, supported by mounting points for up to 14 120 mm fans and dual 420 mm radiators. The front panel includes one USB 20Gbps Type-C port with 60W Power Delivery, four USB 10Gbps Type-C ports, four USB 5Gbps Type-A ports and a combined audio jack. A dedicated LED switch controls lighting without software.

Rotatable tray and vertical GPU upgrade

The motherboard tray rotates in four orientations and detaches completely for bench-style assembly before final installation. An included PCIe Gen 5 riser cable enables vertical graphics card mounting for cards up to 400 mm long. CPU coolers up to 170 mm and power supplies up to 200 mm deep are supported. Builders needing more than eight expansion slots or a smaller footprint should consider other form factors.

Highlights

  • Centered layout with triple-sided tempered glass showcases premium components from every angle
  • 4-way rotatable motherboard tray lets you pick orientation for airflow, cable routing and display
  • Detachable tray works as a test bench so core parts can be built and checked outside the case
  • Vertical airflow design supports up to 14 fans and dual 420 mm radiators for extreme cooling
  • PCIe Gen 5 riser cable enables vertical GPU mounting while front USB-C delivers up to 60 W power delivery

Specifications

BrandMSI
ModelMEG MAESTRO 900R
TypeATX Full Tower
Motherboard CompatibilityATX / E-ATX / Micro ATX / Mini ITX
Internal 3.5" Drive Bays4
Internal 2.5" Drive Bays8
Expansion Slots8 (Horizontal)
3 (Additional Vertical)
Front Ports1 x USB 20Gbps (Type-C, PD 60W )
4 x USB 10Gbps (Type-C)
4 x USB 5Gbps (Type-A)
1 x Audio Out / Mic In
1 x LED Switch Button
1 x Power Button
Fan OptionsTop: 4 x 120 mm / 3 x 140 mm / 3 x 160 mm
Side: 3 x 120 mm (Left) + 3 x 120 mm (Right)
Bottom: 4 x 120 mm / 3 x 140 mm / 3 x 160 mm
Pre-installed FansBottom: 3 x 160 mm ARGB Fan (Reverse Blades Fan)
Radiator OptionsBottom - Up to 120mm / Bottom - Up to 140mm / Bottom - Up to 240mm / Bottom - Up to 280mm / Bottom - Up to 360mm / Bottom - Up to 420mm / Side - Up to 120mm / Side - Up to 140mm / Side - Up to 360mm / Top - Up to 120mm / Top - Up to 140mm / Top - Up to 240mm / Top - Up to 280mm / Top - Up to 360mm / Top - Up to 420mm
Max GPU Length400 mm
Max CPU Cooler Height170 mm
Max PSU Length200 mm
Dimensions695 x 379 x 671 mm / 27.36 x 14.92 x 26.42 inches
Weight33kg
Shipping weight34.02 kg
Package size899 × 746 × 533 mm

Questions about this item

How do I install the motherboard using the 4-way rotatable tray, and what step do builders often miss?

Remove the tray, mount the board in the chosen orientation, then re-secure the tray with the locking screws — the step often missed is tightening those screws after rotation.

What maintenance will the pre-installed 160 mm ARGB reverse-blade fans need later?

Dust the blades and frame every few months with compressed air; the ARGB lighting and motor are sealed, so no lubrication or disassembly is required.

What thermal limit appears first when running dual 420 mm radiators under sustained load?

The 170 mm CPU cooler height clearance becomes the limiting factor before radiator thickness or fan count.

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