Lian Li
O11 Dynamic EVO
$169.99
Released 2022-01
Best PC Cases · head-to-head
O11 Dynamic EVO vs AIR 903 MAX
A sourced, side-by-side comparison. AIR 903 MAX is cheaper at $75. Every spec and price links to its source.
Montech
AIR 903 MAX
$75Cheaper
Released 2023-06
Which is better: the O11 Dynamic EVO or AIR 903 MAX?
On the specs we track, they're closely matched. The AIR 903 MAX is the cheaper at $75.
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | O11 Dynamic EVO | 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 — O11 Dynamic EVO: lian-li.com (verified 2026-06-15). AIR 903 MAX: montechpc.com (verified 2026-06-15).
What's the difference between the O11 Dynamic EVO and AIR 903 MAX?
Where the two actually differ on the specs we track (7 of 7). Matching specs are omitted.
- Form factor: O11 Dynamic EVO Mid-Tower (E-ATX up to 280 mm/ATX/mATX/ITX) vs AIR 903 MAX Mid-Tower (E-ATX/ATX/mATX/ITX)
- Max GPU length (mm): O11 Dynamic EVO 426 vs AIR 903 MAX 400
- Max cooler height (mm): O11 Dynamic EVO 167 vs AIR 903 MAX 180
- Included fans: O11 Dynamic EVO 0 (no fans included in base config) vs AIR 903 MAX 3 x 140 mm ARGB PWM (front) + 1 x 140 mm PWM (rear)
- Radiator support: O11 Dynamic EVO Top: 360/280 mm; Side: 360/280 mm; Bottom: 360 mm vs AIR 903 MAX Front: 360/280/240/140/120 mm; Top: 360/280/240/140/120 mm
- Side panel: O11 Dynamic EVO 4 mm Tempered Glass (both front and side) vs AIR 903 MAX Tempered Glass
- Dimensions (mm): O11 Dynamic EVO 465 x 285 x 459 vs 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.
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 the fetched page returned 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.
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.