





Product description


About Montech
MONTECH was established by Telon in 2016, which focuses in the PC gaming market. MONTECH is quite successful in the Taiwanese market. It is now seeking to expand to the world. There are four pillars of our core values, we abbreviate them to four simple letters, SSEC. Simplicity, Safety, Easy To Use, and Customer-Trust. SSEC is how we do everything, like designing products, manufaturing, commuicating with customers, it is our deepest values here in Montech.
AIR 903 MAX
Ultra-Cooling Mid-Tower with Max Capacity
A Mid-Tower Case Designed for both Air and Liquid Cooling360mm Radiator Support at the Top and Front180mm Height for a Top-Class Air coolerInnovative Mesh Front Panel for the Best Cooling PerformanceHigh-Performance HP140 PWM FansSupport for Vertical GPU Mounting*Ample Space for Flagship 4090 Graphics CardsSpacious Cable Management routesUSB TYPE-C Port and 2x USB3.0 Port

Classic Reversion – Epic Evolution
Introducing the all-new Montech AIR 903 series – the ultimate upgrade for discerning PC enthusiasts. Building upon the immense success of the first-generation AIR 900 series, Montech has redefined excellence with this comprehensive enhancement.

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.

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.

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.

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.
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Customer Reviews
4.7 out of 5 stars 652
4.7 out of 5 stars 652
4.7 out of 5 stars 652
4.7 out of 5 stars 652
Price
$64.98$64.98 $69.00$69.00 $89.99$89.99 $89.97$89.97
Color
black white black white
MB Support
E-ATX.ATX.Micro-ATX.Mini-ITX E-ATX.ATX.Micro-ATX.Mini-ITX E-ATX.ATX.Micro-ATX.Mini-ITX E-ATX.ATX.Micro-ATX.Mini-ITX
CPU Cooler
180mm 180mm 180mm 180mm
GPU
400mm 400mm 400mm 400mm
PSU
240mm ATX PSU 240mm ATX PSU 240mm ATX PSU 240mm ATX PSU
Drive Bay
2.5″SSD* 5(Maximum) / 3.5″HDD*2 2.5″SSD* 5(Maximum) / 3.5″HDD*2 2.5″SSD* 5(Maximum) / 3.5″HDD*2 2.5″SSD* 5(Maximum) / 3.5″HDD*2
Fan Support
Top_120mm*3 or 140mm*2 / PSU shroud_120mm*2 / Rear_120mm*1 or 140mm*1 / Front_120mm*3 / 140mm*3 Top_120mm*3 or 140mm*2 / PSU shroud_120mm*2 / Rear_120mm*1 or 140mm*1 / Front_120mm*3 / 140mm*3 Top_120mm*3 or 140mm*2 / PSU shroud_120mm*2 / Rear_120mm*1 or 140mm*1 / Front_120mm*3 / 140mm*3 Top_120mm*3 or 140mm*2 / PSU shroud_120mm*2 / Rear_120mm*1 or 140mm*1 / Front_120mm*3 / 140mm*3
Radiator Support
Front_120/140/280/360mm / Top_120/140/280/360mm / Rear_120mm Front_120/140/280/360mm / Top_120/140/280/360mm / Rear_120mm Front_120/140/280/360mm / Top_120/140/280/360mm / Rear_120mm Front_120/140/280/360mm / Top_120/140/280/360mm / Rear_120mm
Unleash unparalleled cooling performance and superior thermal efficiency with the innovative metal front panel featuring a staggering 51% ventilation rate, creating the ultimate gaming experience.
Meticulously designed mesh front panel acts as a formidable dust filter, allowing for effortless dismantling and easy cleaning while maintaining optimal airflow.
Experience a mesmerizing gaming wonderland with the AIR 903 Max. High-Performance PWM Fans: 3x HP140 ARGB & 1x HP140 Fans with LED/PWM controller deliver 21 captivating lighting effects for a vibrant masterpiece.
Achieve optimal heat dissipation with the versatile design, supporting 360mm AIO coolers at the front and top, while offering ample 180mm height clearance for powerful CPU tower coolers.
Accommodate graphics cards up to 400mm in length and 190mm in width, including popular giants like the NVIDIA GeForce RTX 40 series
9 reviews for Montech AIR 903 MAX, E-ATX Mid Tower Case, High Airflow, 3X 140mm ARGB PWM & 1x 140mm PWM Fans Pre-Installed, Tempered Glass Side Panel, Mesh Front, Type-C, Support 4090 GPUs, Black
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$89.99
brian olson –
Great case but terrible coil whine from the exhaust
The case itself is great to build in, with plenty of space and openings to route cables; I had no issues getting anything to reach its intended destination. Excellent airflow/thermal performance – the pre-installed fans move a lot of air, and the ARGB is nice. The included fan hub worked perfectly with my B850 Tomahawk motherboard.Chief Downside: The exhaust fan has very noticeable coil whine, and can’t be set above 20% speed without driving me crazy; it’s like having a dentist’s drill whirring right next to me. I detached this fan from the hub to run it at a constant low speed, thus allowing the intake fans (which do not have any coil whine) to run an actual curve.I will replace the exhaust fan at some point; you should budget the cost of a new fan into the cost of this case, imo.
Teddy West Side –
Great Case!
Pros: Super easy to build in. HDD Cage comes out with just thumb screws giving you the whole basement for power cable management. Tons of clearance in the front and top for any radiator with 120mm or 140mm fans. My Xfx Speedster Swft 319 rx6800 graphics card fits with tons of room to spare. Four 140mm fans are included (3aRGB, 1 black) as is a control hub. Magnetic dust screens are awesome and air flow is exceptional. Both the glass and metal sides attach with captured thumb screws so you can’t lose them. All of the expansion slots in the back have thumb screws as well. Build quality and finishes are above average for the price range.Cons: Included fans are on the louder side, but tolerable if you set up a custom fan curve. Only average room for cable management in the back. Power and front I/O are on the side that you would normally face away from you. Definitely not deal breakers though.Bottom Line: Definitely the budget king! It has everything most people need, tons of space, easy to build in, excellent airflow, 4 included fans, and it looks good. You can’t do better without spending twice as much.
C –
Excellent case, a bit loud but has great features.
I love how this looks and how easy cable management was. Having a PSU shroud was amazing for hiding excess cable.The front fans are powerful, but a little loud when they ramp up. The RGB is nice and functions well. It fits my large GPU just fine, and had plenty of space for AIO coolers.This is one of the easiest cases I have built in and I would gladly buy this again for future builds
Carisneat123 –
Works Great!
Good quality, strong, came with everything I needed, and was easy to cable manage. Fans work great, just don’t forget to plug the hub into the power cablelike I did 😂Looks amazing! I’m used to laptops so I can’t really comment on noise. Everything fit well and it seems it will fit almost any GPU. My system and motherboard temps are staying under 30°c idling and 55°c in use. Pretty darn good.The side panels are easy to remove with thumb screw but are also secure when you want them together. Makes it easy to open and adjust things.I have a gaming YT channel called Carisneat123 where I will be posting the build for any one interested in seeing how and what I used in this case!
Ansley Worrell –
Decent for the price
Pretty good case, I like the cable management and the airflow is good. The fans are very pretty with the aRGB lights. The thumb screws are pretty wonky though, they don’t screw in very easily. The panels for the graphics card in the back feel pretty cheap as well. Overall a good case for the money with a few minor annoyances.
Jeff. R –
amazing case for the price
Simply put this is an amazing case for the price. I do wish their was software for the RGB fans but I dont mind at all since it comes with a full USB fan hub that makes connecting all the fans so easy and helpfulNormally a hub like the one in this case would cost an extra 30 to 50 bucks and you would have to find a way to stuff it inside but here this is awesome. It fits a standard ATX with no issues and has space to move things aroundThe one downside is one of the MB standoff does not work for putting my MB on it. I dont mind since it is only one and 4 other stand offs fit just fine also It could be my MB being slightly different. This is not a big deal since the middle one and 4 others fit just fine.The look is simple and without it being too gamer like and you can use it for so many other things too.
Tommy Amos –
Sleek Design and Excellent Airflow Make This Case a Winner
This computer case really caught my eye with its modern styling, and I was even more impressed when I finally built my new desktop using it. One of the standout features is definitely how much air this case can move. Keeping the components cool is crucial for performance and longevity, and this case seems to do an excellent job of promoting airflow throughout the system.The inclusion of RGB lighted fans is also a fantastic touch. They add a vibrant and customizable aesthetic to the build, allowing for a personalized look that’s visually appealing. Furthermore, the case comes equipped with all the essential cables needed for setup, which is a thoughtful detail that simplifies the building process.For anyone who appreciates a clean and organized interior, this case shines in its cable management design. The strategically placed pathways make it easy to route and conceal cables, resulting in a tidy build that not only looks better but can also contribute to better airflow. The user-friendly design facilitates easy access to the internal components by making opening the case straightforward.Pros:The product has the ability to move a lot of air.Looks great.Low noise.The cable management is excellent.I am extremely satisfied with my purchase.Cons:None I found.Overall, this computer case offers a winning combination of attractive design and practical functionality. The excellent airflow, coupled with the stylish RGB fans and thoughtful cable management, makes it a fantastic choice for any PC builder. I am thrilled with this purchase and would highly recommend it to others looking for a high-quality case.
RealTalkBuyer –
I was researching for almost 2 months what computer case to get, and almost everyone recommends this case.It’s one of the best budget cases out there. It already comes with the fans + there are extra pwm plugs in the hub as well. I paired this case with 5 Arctic fans, and it works well!Managing cables in the back was easy to do as well. The case has a lot of room for cables.
Uriel Palomino Flores –
Excelente case, muy espacioso y con todo lo necesario para hacer el ensamble, estaba preocupado por si bastaría para placas ATX y si, incluye un hub para ventiladores con RGB muy practico, definitivamente buena opción de case