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- $70.99
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$65.00
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Montech AIR 903 BASE, E-ATX Mid Tower Case, High Airflow with Max Capacity, 3x 140mm PWM Fans Pre-installed, Tempered Glass Side Panel, Mesh Front, TYPE-C, Support 4090 GPUs, Black
- 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.
- Take your cooling to new heights with the three pre-installed HP140 high-performance cooling fans, offering exceptional airflow and ensuring efficient heat extraction from the case.
- 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.
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Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 1 year
- Limited Warranty period (labor): 1 year
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
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The Montech AIR 903 BASE is a high-airflow E-ATX mid-tower PC case for gaming PCs and workstations that need strong cooling and generous component clearance. It includes three pre-installed 140mm PWM fans, supports GPUs up to 400mm, CPU coolers up to 180mm, and radiators up to 360mm.
Recommended For
- PC builders assembling high-airflow gaming systems with large GPUs and tower coolers, especially builds using high-wattage CPUs or GPUs that benefit from strong unrestricted intake airflow.
- Builders installing oversized components, such as E-ATX motherboards, 400 mm graphics cards, 180 mm CPU coolers, or 360 mm front- or top-mounted radiators.
- Value-focused builders who want useful cooling and component clearance without paying for built-in RGB lighting, an ARGB controller, or premium case styling.
- First-time or occasional PC builders who prioritize a spacious interior, straightforward cable routing, and enough included fans to complete a typical gaming build without immediately buying more case fans.
- Users who need a conventional mid-tower layout with room for multiple SSDs or hard drives, while still retaining modern front I/O such as USB-C.
Real-World Use Scenarios
- For a gaming PC with a heat-generating graphics card, the AIR 903 BASE’s open mesh front and included fans provide a direct airflow path; a review found that removing the front panel made little difference to cooling in its tests.
- When building around a long, high-end graphics card, the spacious interior can make installation and cable routing less cramped; one owner reported an easy build with an RTX 4080 Super.
- For a system using a 360mm liquid cooler, the case offers a choice of front or top mounting, giving builders flexibility when planning cooling and component layout; check radiator thickness and motherboard clearance before choosing a top mount.
- For a first-time or budget-conscious PC build, the roomy layout and pre-installed fans can simplify assembly and reduce the need to buy extra case fans immediately; KitGuru also reported no component-alignment or access problems during its build.
- For someone who prefers a restrained, non-RGB build, the BASE’s included fans have no RGB lighting, so the finished PC can keep a simple look without replacing the stock fans.
- For routine dust maintenance, the removable mesh front and dust-filtered panels make it easier to access and clean the case than a fixed, enclosed front panel.
Reference Q&A
Q: Is the Montech AIR 903 BASE better than the Corsair 4000D Airflow for a high-end gaming PC?
A: Choose the Montech AIR 903 BASE when you need more installation room and stronger out-of-the-box airflow. It supports E-ATX motherboards, GPUs up to 400 mm, 180 mm CPU coolers, and 360 mm radiators at both the front and top, while including three 140 mm PWM fans. The Corsair 4000D Airflow is more compact and has a well-established cable-management layout, so it is the better fit when smaller dimensions and a compact ATX build matter more than maximum hardware clearance.
Q: Should I buy the Montech AIR 903 BASE or AIR 903 MAX?
A: Buy the AIR 903 BASE if you want the same large chassis and cooling compatibility without integrated RGB lighting. The BASE includes three 140 mm PWM fans, while the AIR 903 MAX adds four 140 mm fans, including three ARGB front fans, plus an ARGB/PWM controller. Cooling support, motherboard compatibility, GPU clearance, radiator support, and case dimensions are otherwise broadly the same, so the MAX is mainly an upgrade for lighting, fan quantity, and included control hardware.
Q: Is the Montech AIR 903 BASE a better value than the Phanteks XT Pro?
A: Choose the AIR 903 BASE when you want more included cooling and broader liquid-cooling flexibility. It comes with three 140 mm PWM fans and supports 360 mm radiators at the front and top. The Phanteks XT Pro offers a slightly larger GPU limit, a 184 mm CPU-cooler limit, hidden-connector motherboard support, and a longer listed warranty, but it includes only one rear 120 mm fan and supports up to a 240 mm front radiator. The Montech is the more convenient choice for a performance-focused build that should not require immediate fan additions.
Q: Should I choose the Montech AIR 903 BASE or Fractal Design Pop Air for an easier-to-move PC?
A: Choose the Fractal Design Pop Air when lower weight, shorter height, and a more compact ATX enclosure are priorities. Choose the AIR 903 BASE when cooling capacity and component clearance matter more. The Montech supports E-ATX boards, 400 mm graphics cards, 180 mm CPU coolers, and 360 mm radiators, while the Pop Air is lighter and supports ATX, GPUs up to 405 mm, 170 mm CPU coolers, and radiators up to 280 mm in front or 240 mm on top. Neither case is designed for frequent transport, but the Pop Air is the more portability-oriented option.
Q: Will a long or large graphics card fit in this case?
A: Yes. The case supports graphics cards up to 400 mm long and 190 mm wide, making it suitable for many large modern GPUs. Check the exact GPU dimensions, power-connector clearance, and whether a front radiator or fan configuration reduces available space.
Q: Can I install a 360 mm liquid-cooling radiator in this case?
A: Yes. The Montech AIR 903 BASE supports radiators up to 360 mm at both the front and top. Before installation, verify clearance with the motherboard, memory modules, CPU power connectors, and graphics card, because component placement can affect radiator compatibility.
Q: Does the case include fans, and is it suitable for an airflow-focused build?
A: Yes. Three 140 mm PWM fans are pre-installed. The case also uses a mesh front panel with a stated 51% ventilation rate and includes bottom and top dust filters, making it suitable for builds that prioritize airflow and easier dust maintenance.
Q: Which motherboards and CPU coolers are compatible with this case?
A: The case supports E-ATX, ATX, Micro ATX, and Mini ITX motherboards. It accommodates CPU air coolers up to 180 mm tall, so users should compare the cooler's listed height with the case limit before purchasing.
Q: Does the case have front USB Type-C and enough storage support for a typical gaming PC?
A: Yes. The front I/O includes one USB Type-C port, two USB 3.0 ports, and two audio ports. Storage support includes two internal 3.5-inch bays and up to five 2.5-inch bays, although the maximum 2.5-inch configuration can vary when an E-ATX motherboard is installed.
Q: Is the Montech AIR 903 BASE a good choice for an airflow-focused gaming PC?
A: Yes. It is well suited to airflow-focused builds because it combines a ventilated mesh front with three pre-installed 140mm fans. Reddit users commonly describe its airflow and value as strong, while the trade-off is a relatively large mid-tower footprint and less premium build quality than more expensive cases.
Q: Are the three included fans enough, or should they be replaced immediately?
A: The included three-fan setup is generally sufficient for a typical gaming PC and does not require immediate replacement. Community discussions indicate that upgrading to higher-RPM fans usually provides limited thermal benefit unless the system has unusually high heat loads, noise concerns, or a specific airflow problem.
Q: Is the AIR 903 BASE suitable for a high-end GPU and large air cooler?
A: Yes. The case supports graphics cards up to 400 mm long and CPU coolers up to 180 mm tall, making it suitable for many large GPUs and tower coolers. Reddit build reports specifically mention fitting RTX 4080-class cards, while compatibility still depends on the exact GPU, radiator, and front-mounted hardware.
Q: Should you choose the AIR 903 BASE instead of the AIR 903 MAX?
A: Choose the BASE if you want the lower-cost version and do not need extra pre-installed fans or RGB lighting. Choose the MAX if you prefer more included fans, RGB, or additional cable-management space. Reddit discussions suggest the BASE's three fans are already adequate, so the MAX is mainly justified by its added features rather than a necessary cooling upgrade.
Q: Is the AIR 903 BASE a practical replacement for an older case with poor cooling?
A: It is a practical replacement when better airflow, GPU clearance, and included fans are the main priorities. It supports ATX and E-ATX motherboards, large GPUs, 360mm radiators, and up to five 2.5-inch drives. The main trade-offs are its larger dimensions and limited support for only two internal 3.5-inch drives.