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Black mid tower case with aluminium frame, steel panels and tempered glass sides

Lian Li

Lian Li O11DERGBX ATX Mid Tower PC Case

SKU CH-66W4-RWXFR MPN O11DERGBX

An ATX mid-tower with dual tempered-glass panels, room for E-ATX boards under 280 mm, ten fan mounts, top 420 mm radiator support, and a reversible layout

  • TypeATX / Micro ATX Mid Tower
  • ColorBlack
  • Case MaterialSteel, Aluminum, Tempered glass
  • With Power SupplyNo
  • Motherboard CompatibilityEATX(under 280mm)/ATX/MICRO-ATX/MINI-ITX
  • Side Panel2 x Sides Tempered Glass Panel

Options Black

  • Supports EATX boards up to 280 mm for high-end builds
  • Dual tempered glass panels showcase components from two angles
  • Fits radiators up to 420 mm at the top for extreme cooling
  • Modular I/O module moves to three positions without tools
  • Holds GPUs up to 455.7 mm and CPU coolers up to 167 mm

Build focus

The Lian Li O11 Dynamic EVO RGB is an ATX mid-tower case built from steel, aluminium and tempered glass. It targets builders who want a showcase chassis with dual ARGB light strips on the top and bottom edges. The reversible layout and adjustable motherboard tray give flexibility for custom-loop or air-cooled configurations.

Compatibility check

Verify that your motherboard fits the E-ATX limit of 280 mm width and that your graphics card does not exceed 455.7 mm in length. CPU coolers must stay within 167 mm height and the power supply must be an ATX unit shorter than 220 mm. Drive cages accept two 3.5-inch or 2.5-inch drives plus additional 2.5-inch mounts behind the motherboard tray.

Thermals and power

The case supports up to ten fans in 120 mm or 140 mm sizes across side, bottom, rear and top positions. Radiator mounts allow 360 mm, 280 mm or 240 mm units on the side and bottom, and a 420 mm unit on the top. No fans are pre-installed, so airflow and noise depend entirely on the cooling hardware you choose.

Highlights

  • Supports EATX boards up to 280 mm for high-end builds
  • Dual tempered glass panels showcase components from two angles
  • Fits radiators up to 420 mm at the top for extreme cooling
  • Modular I/O module moves to three positions without tools
  • Holds GPUs up to 455.7 mm and CPU coolers up to 167 mm

Specifications

BrandLIAN LI
ModelO11DERGBX
TypeATX / Micro ATX Mid Tower
ColorBlack
Case MaterialSteel, Aluminum, Tempered glass
With Power SupplyNo
Motherboard CompatibilityEATX(under 280mm)/ATX/MICRO-ATX/MINI-ITX
Side Panel2 x Sides Tempered Glass Panel
Dust Filters1 x Bottom
Internal 3.5" Drive BaysHard Drive Cage: 2 X 3.5" HDD or 2.5" SSD
Side fan Bracket: 2 X 3.5" HDD or 4x 2.5" SSD
Internal 2.5" Drive BaysBehind MB Tray: 2 X 2.5" SSD
Front Ports2 x USB 3.0, 1 x Audio, 3 x Buttons
Fan OptionsSide: 120mm x3 / 140mm x3
Bottom: 120mm x3/ 140mm x3
Rear: 120 mm x1
Top: 120mm x3 / 140mm x3
Pre-installed FansNo Fan Installed
Radiator OptionsSide: 360 / 280 /240
Bottom: 360 / 280 /240
Top: 360/ 420 /240
Max GPU Length455.7 mm(Max)
Max CPU Cooler Height167 mm(Max)
Max PSU LengthATX(under 220 mm)
Dimensions18.82" x 11.42" x 18.54"
Weight37.92 lbs.
Shipping weight17.15 kg
Package size610 × 541 × 386 mm

Other versions of this model

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Questions about this item

What is included in the box and do I need to buy fans separately?

The case ships with dual ARGB light strips installed along the top and bottom, tempered glass side panels and a single bottom dust filter. No fans are pre-installed so you will need to purchase up to ten 120 mm or 140 mm fans for the side, bottom, top and rear mounts.

Which motherboard form factors fit and how does the reversible layout affect the choice?

The chassis accepts E-ATX up to 280 mm wide, ATX, Micro-ATX and Mini-ITX boards. The reversible design lets you move the I/O module to three different positions without tools, so you can orient the build for either traditional or rotated airflow while keeping the same motherboard support.

What does the 420 mm top radiator support mean for an actual liquid-cooling loop?

You can mount a 420 mm radiator in the roof alongside three 140 mm fans, while the side and bottom each accept up to 360 mm radiators. This gives enough surface area for a high-wattage CPU and GPU on a single loop without exceeding the 167 mm CPU cooler height or 455.7 mm GPU length limits.

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