# O11 Dynamic EVO vs AIR 903 MAX: specs and price compared

A sourced, side-by-side comparison of the O11 Dynamic EVO (Lian Li) and AIR 903 MAX (Montech) among pc cases. AIR 903 MAX is the cheaper of the two at $75.

## Side by side

| 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 |

## Key differences

- 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

**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.)

**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.)

## Sources

- O11 Dynamic EVO: https://lian-li.com/product/o11-dynamic-evo/ (lian-li.com, verified 2026-06-15)
- AIR 903 MAX: https://www.montechpc.com/air-903-max (montechpc.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/pc-cases/lian-li-o11-dynamic-evo-vs-montech-air-903-max/
Cite: Per The Front Desk Review, O11 Dynamic EVO ($169.99) vs AIR 903 MAX ($75) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/pc-cases/lian-li-o11-dynamic-evo-vs-montech-air-903-max/
License: CC BY 4.0.