Case · MODEL NOTES
MONTECH AIR 903 BASE Black
A roomy mesh case that already includes three 140 mm PWM fans.
The AIR 903 BASE offers a useful starting airflow arrangement without requiring a separate fan shopping list immediately. Its generous listed GPU and tower-cooler limits make it worth comparing with smaller cases, but leave room for cables and any radiator. BASE identifies the package; check it rather than assuming MAX accessories are included.
Consider it when
- A conventional tower build using the included three-fan arrangement.
- A larger GPU or air cooler whose final dimensions have been checked.
Look again when
- A desk or under-desk space that cannot accommodate the chassis.
- An E-ATX board chosen only by the form-factor label without checking its width.
The checks that can change your choice
400 mm does not include every cable route
Check graphics-card height and the power connector’s required bend room alongside length. The side panel and front radiator can constrain a card whose nominal length is comfortably below the stated maximum.
Use the included fans before expanding
Confirm their placement, connect PWM control and assess your workload first. Extra fans require compatible mounts and header capacity; a larger fan count alone does not establish lower temperatures or a quieter system.
Published specifications
Mesh mid-tower; three included 140 mm PWM fans; GPU clearance 400 mm; air cooler clearance 180 mm.
| Brand | MONTECH |
|---|---|
| Exact model | AIR 903 BASE Black |
| Form factor | Mid-tower |
| Case motherboard support | E-ATX, ATX, micro-ATX, Mini-ITX |
| Case GPU length limit | 400 mm; cooling and layout can reduce this |
| Case CPU cooler height limit | 180 mm |
| Case PSU formats | ATX |
| Case PSU length limit | 240 mm; allow cable and drive-cage space |
| Radiator mount: front / 120 mm | Check mounting dimensions and occupied positions |
| Radiator mount: front / 140 mm | Check mounting dimensions and occupied positions |
| Radiator mount: front / 240 mm | Check mounting dimensions and occupied positions |
| Radiator mount: front / 280 mm | Check mounting dimensions and occupied positions |
| Radiator mount: front / 360 mm | Check mounting dimensions and occupied positions |
| Radiator mount: top / 120 mm | Check mounting dimensions and occupied positions |
| Radiator mount: top / 140 mm | Check mounting dimensions and occupied positions |
| Radiator mount: top / 240 mm | Check mounting dimensions and occupied positions |
| Radiator mount: top / 280 mm | Check mounting dimensions and occupied positions |
| Radiator mount: top / 360 mm | Check mounting dimensions and occupied positions |
Top and front radiators: 120/140/240/280/360 mm. Check radiator thickness, GPU power cable width and exact E-ATX board dimensions before purchase.
A different choice worth checking
These alternatives address related choices. Recheck their platform, connections and fit before treating one as a replacement.
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Sources and review notes
RigAtlas connects manufacturer specifications to component choices. This page is document-based analysis; it does not claim a hands-on test or a current store offer.
- MONTECH — exact model specificationsEvidence checked
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