Classic Reversion – Epic Evolution

Introducing the Montech AIR 903 series - the ultimate upgrade for PC enthusiasts. It offers superior aesthetics, unparalleled airflow, meticulous attention to detail, and exceptional compatibility.

Get ready for the best mainstream case of 2023.

Maximize Airflow, Optimize Performance

Experience the innovative AIR 903 case with a metal front panel featuring a staggering 51% ventilation rate.

It maximizes airflow, delivering superior thermal performance and an ultimate gaming experience.

Unleash the Ultimate Dust-Free Experience

Enjoy optimal airflow, easy cleaning with the quick-release design, and comprehensive dustproof protection with strategically placed filters.

Pre-Installed 3x 140mm PWM Fans

Achieve the perfect balance between silence and maximum cooling power with the customizable rotational speed of HP140 high-performing cooling fans.

Limitless Cooling Potential and Customization Freedom

Offers maximum airflow and versatility with a generous clearance for CPU tower coolers, support for 360mm AIO coolers at the front and top, and the ability to install up to 9 fans.

Seamless Fit for Massive GPUs and Unparalleled PSU Clearance

Offers unrivaled graphics card compatibility, accommodating massive GPUs up to 400mm in length and 190mm in width, including popular models like the NVIDIA® GeForce RTX® 40 series with ease.

True E-ATX Compatibility and Seamless Installation

Supports E-ATX and SSI-EEB form factors, providing a seamless installation experience with pre-punched mounting holes and cable routing holes.

Clean and Tangle-Free Cable Routing

Features a spacious 27mm cable route, rubber grommets, and Velcro straps for a hassle-free and organized interior.

Vertical GPU Mounting Compatible

Upgrade your gaming experience with the Montech Vertical Graphics Card Mounting Kit (sold separately). Remove all 7 PCIe slot covers for effortless installation and enjoy improved thermal performance and striking visuals by vertically mounting your graphics card. Elevate your GPU's aesthetics and performance like never before.

Model	AIR 903 BASE
Color	black
Dimensions(LWH)	478230493 (mm) 7.6kg (Case) / 555293535 (mm) 9.05kg (Carton)
MB Support	E-ATX, ATX, Micro-ATX, Mini-ITX
Front I/O	USB Type-C1 / USB3.02 / MIC1 / SPK1 / LED SW / RESET
PCIe Slots	7
Compatibility / Maximum	CPU Cooler	180mm
	GPU	400mm
	PSU	240mm
Drive Bay	3.5” HDD	2
	2.5” SSD	5 (Maximum) (2.5” SSD*3 are supported with E-ATX MB installed)
Pre-installed Fan(s)	Front	140mm*2 (HP140 PWM)
	Rear	140mm*1 (HP140 PWM)
Fan Support	Front	140mm3 / 120mm3
	Rear	140mm1 / 120mm1
	Top	140mm2 / 120mm3
	Above PSU	120mm*2
Radiator Support	Front	360 / 280 / 240 / 140 / 120mm
	Top	360 / 280 / 240 / 140 / 120mm
Dust Filters	Top, Bottom

Montech AIR 903 Base Mesh Black ATX Case

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