Lian Li
Lian Li O11 Dynamic EVO
$169.99
Released 2022-01
Best PC Cases · head-to-head
Lian Li O11 Dynamic EVO vs Montech AIR 903 MAX
A sourced, side-by-side comparison. Montech AIR 903 MAX is cheaper at $75. Every spec and price links to its source.
Montech
Montech AIR 903 MAX
$75Cheaper
Released 2023-06
Which is better: the Lian Li O11 Dynamic EVO or Montech AIR 903 MAX?
On the specs we track, they're closely matched. The Montech AIR 903 MAX is the cheaper at $75.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  Lian Li O11 Dynamic EVO |  Montech AIR 903 MAX |
|---|---|---|
| US price | $169.99 | $75 |
| Brand | Lian Li | Montech |
| Released | 2022-01 | 2023-06 |
| Form factor | Mid-Tower (E-ATX up to 280 mm/ATX/mATX/ITX) | Mid-Tower (E-ATX/ATX/mATX/ITX) |
| Max GPU length (mm) | 426 | 400 |
| Max cooler height (mm) | 167 | 180 |
| Included fans | 0 (no fans included in base config) | 3 x 140 mm ARGB PWM (front) + 1 x 140 mm PWM (rear) |
| Radiator support | Top: 360/280 mm; Side: 360/280 mm; Bottom: 360 mm | Front: 360/280/240/140/120 mm; Top: 360/280/240/140/120 mm |
| Side panel | 4 mm Tempered Glass (both front and side) | Tempered Glass |
| Dimensions (mm) | 465 x 285 x 459 | 478 x 230 x 493 |
| Release | 2022-01 | 2023-06 |
Sources — Lian Li O11 Dynamic EVO: lian-li.com (verified 2026-06-15). Montech AIR 903 MAX: newegg.com (verified 2026-06-15).
What's the difference between the Lian Li O11 Dynamic EVO and Montech AIR 903 MAX?
Where the two actually differ on the specs we track (7 of 7). Matching specs are omitted.
- Form factor: Lian Li O11 Dynamic EVO Mid-Tower (E-ATX up to 280 mm/ATX/mATX/ITX) vs Montech AIR 903 MAX Mid-Tower (E-ATX/ATX/mATX/ITX)
- Max GPU length (mm): Lian Li O11 Dynamic EVO 426 vs Montech AIR 903 MAX 400
- Max cooler height (mm): Lian Li O11 Dynamic EVO 167 vs Montech AIR 903 MAX 180
- Included fans: Lian Li O11 Dynamic EVO 0 (no fans included in base config) vs Montech AIR 903 MAX 3 x 140 mm ARGB PWM (front) + 1 x 140 mm PWM (rear)
- Radiator support: Lian Li O11 Dynamic EVO Top: 360/280 mm; Side: 360/280 mm; Bottom: 360 mm vs Montech AIR 903 MAX Front: 360/280/240/140/120 mm; Top: 360/280/240/140/120 mm
- Side panel: Lian Li O11 Dynamic EVO 4 mm Tempered Glass (both front and side) vs Montech AIR 903 MAX Tempered Glass
- Dimensions (mm): Lian Li O11 Dynamic EVO 465 x 285 x 459 vs Montech AIR 903 MAX 478 x 230 x 493
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Lian Li O11 Dynamic EVO
Only one whitelisted source survived verification: Tom's Hardware's hands-on of the exact O11 Dynamic EVO. It is explicitly a hands-on build rather than a full lab review (the author states they don't have cooling and acoustic numbers), and it praises the case's near-endless modularity while flagging its enormous, likely floor-bound footprint, inconvenient bottom-mounted I/O, the lack of any included fans, and how quickly cost escalates once you add kits. The originally-cited TechPowerUp lab review was dropped because its page showed only the review's introduction and none of its conclusion quotes were present in the text. (1 sourced review.)
Praised: Near-endless modularity and reconfiguration — reversible layout, movable front I/O, and five optional kits make it more a case platform than a fixed chassis; Reasonably priced base model (~$169) for the feature set, including a tasteful front RGB strip; Downright huge, easy-to-build interior with tool-free panel removal and roughly 16 inches of GPU clearance.
Flagged: Enormous footprint (over 18 inches tall, ~11 inches wide) — likely floor-bound, which makes the bottom-mounted I/O ports inconvenient; Ships with no fans; buyers must budget extra for cooling; Cost escalates quickly once you add kits; the $13 Top I/O kit should be included by default.
Montech AIR 903 MAX
Two hands-on testers (Tom's Hardware, TechPowerUp) both rate the Air 903 Max a standout budget airflow case, praising strong thermals and its sub-$80 price with four fans and a PWM/ARGB hub. Tom's measured a fairly loud 48.5 dBA peak and flagged PWM noise oscillation at 40-49%; TPU's gripes were cosmetic and cable-routing (blue USB-A ports, missing grommets). No RTINGS/PCMag coverage found. (1 sourced review, 1 lab-tested.)
Praised: Strong thermal/airflow performance for the price; Sub-$80 value with four included 140mm fans plus a PWM/ARGB hub; Broad hardware support (E-ATX boards, long GPUs, up to 6-7 drives, 360mm radiators).
Flagged: Fairly loud 48.5 dBA peak plus PWM noise oscillation at 40-49%; Cable-management gaps: missing grommets, hard to hide wires with air coolers; Cosmetic/quality nits: blue USB-A ports, non-unified front-panel header.