Corsair FRAME 4000X RS / Lian Li LANCOOL II MESH Performance

Corsair FRAME 4000X RS: CC-9011302-WW · black · standard RS120 fans

Lian Li LANCOOL II MESH Performance: LANCOOL II MESH Performance (black; the Performance-X version adds USB-C). The LANCOOL II MESH RGB with RGB fans, the white colour and the glass-front LANCOOL II are separate versions; the LANCOOL III and 216 are different cases.

SpecificationCorsair FRAME 4000X RSLian Li LANCOOL II MESH Performance
Release year20262020
Announcement and availability7 April 2026; immediately available at announcement Corsair—
Case typeMid-tower; steel, tempered glass, plastic Corsair—
Motherboard supportMini-ITX, Micro-ATX, ATX; E-ATX up to 305 × 277 mm Corsair—
Back-connect motherboard supportSupported Corsair—
Graphics card clearance405 mm with 25 mm front fans; nominal 430 mm without front fans Corsair—
CPU cooler heightUp to 170 mm Corsair—
Power supplyATX; up to 220 mm long Corsair—
Included fans4 × RS120 PWM; unlit Corsair2 × 140 mm PWM at the front (600–1200 rpm, 60.56 CFM, 25.8 dB(A)); 1 × 120 mm PWM at the rear (600–1500 rpm, 54.6 CFM, 26.1 dB(A))

PWM fans are 4-pin fans whose speed can be controlled by the motherboard or the case controller.

Lian Li
Front panelRGB Flow; 64 LEDs; 5 V ARGB Corsair—
Front I/O20 Gbit/s USB-C; 2 × 5 Gbit/s USB-A; combined headphone/microphone Corsair2 × USB 3.0; 1 × USB 3.1 Type-C; TRRS audio jack; fan speed button

The USB-C port is on the Performance-X version; other versions add it with a separately sold kit.

Lian Li
ControlsPower button; no reset switch or drive activity LED Corsair—
Front/top fan railsFront fans up to 200 mm; top fans up to 140 mm Corsair—
Radiator mountsFront/top/side: 240, 280 or 360 mm; rear: 120 or 140 mm Corsair—
SATA drive bracket2 × 2.5-inch SSDs or 1 × 3.5-inch HDD Corsair—
Cable clearance37 mm behind the motherboard Corsair—
Dust filtersFront, side and bottom CorsairMagnetic top filter, tray-type bottom filter

No separate dust filter is listed for the mesh front panel.

Lian Li
Vertical GPU mountingRotatable PCIe bracket; riser cable separate Corsair—
iCUE LINK lightingSeparate RGB adapter, compatible LINK hub and iCUE 5 required

Motherboard ARGB software is a separate control option.

Corsair		—
Case type and motherboard—Mid-tower; E-ATX (under 280 mm wide), ATX, Micro-ATX, Mini-ITX Lian Li
Dimensions—478 × 229 × 494 mm (D × W × H) Lian Li
Materials—Steel; 4 mm tempered glass on both sides

The glass panels and PSU covers are hinged doors that close with magnets; the cable-side glass comes with covers that hide the cables.

Lian Li
Fan support—Front: 2 × 140 mm or 3 × 120 mm; top: 2 × 120 mm or 2 × 140 mm; top of PSU chamber: 2 × 120 mm

The built-in hub supports up to six 3- or 4-pin fans; the four-mode button selects fan speed.

Lian Li
Radiator—Front (multi-way bracket): 360/280/240 mm; top: 240 mm (aligned to the left)

The multi-way bracket places a radiator closer to the motherboard or the front panel; Lian Li warns not to mount a 140/280 mm radiator on the inner side of the bracket.

Lian Li
Component clearances—Graphics card 384 mm; CPU cooler 176 mm; PSU 210 mm; 7 expansion slots Lian Li
Drive bays—3 × 3.5″/2.5″ in the cage; 2 × 2.5″ behind the motherboard tray; 2 × 2.5″ behind the right flip panel; 2 × 2.5″ above the PSU chamber

There is room for up to 9 drives; the drive cage slides on a rail without tools.

Lian Li
Optional kits—Vertical GPU kit (PCIe 3.0 riser); hot-swappable back plate; anti-sag GPU bracket

When using the PCIe 3.0 riser with a PCIe 4.0 motherboard and graphics card, the slot must be set to Gen 3 in the BIOS.

Lian Li