Page 2 – Physical Look – Outside
Like many enthusiast chassis on the market today, the Cooler Master COSMOS ALPHA features a tempered glass side panel. However, this is not just a typical flat glass panel that simply screws onto the side of the chassis. Instead, the glass panel is slightly curved and integrated into the case’s distinctive exterior structure. This curved design gives the case a more premium and futuristic appearance compared to conventional flat-panel designs. There is also a small protective sticker on the panel indicating that the top panel should be removed first before attempting to open the side panels. On the opposite side of the chassis, the panel is made of steel with a matte black finish and features a large mesh ventilation section. While this side panel is less flashy than the tempered glass side, it is also less prone to fingerprints and smudges, though most users will likely keep this side facing the wall.
Moving to the front of the case, the exterior frame is constructed from plastic and features the bold, exoskeleton-inspired styling that has long been associated with the COSMOS series. We actually reviewed the Cosmos II back in 2012. The large curved structural pieces surrounding the chassis serve not only as a design element but also function as practical handles, making it easier to lift or reposition this very large case. The overall look is clearly gamer-focused and quite aggressive, which may not appeal to everyone, but it certainly gives the COSMOS ALPHA a strong visual identity. For airflow, the majority of the front panel consists of a large mesh section. Behind this mesh, two massive 200mm fans come preinstalled, ensuring plenty of airflow right out of the box. We will examine these fans more closely later in the review. The front panel itself is attached using multiple ball-and-socket mounting points and can be removed with a firm pull for easier access. As expected from a modern enthusiast chassis, there are no openings for legacy 5.25" optical drives.
In terms of physical size, the COSMOS ALPHA is undeniably a massive case. Including its external frame and protruding elements, it measures approximately 669mm in length, 330mm in width, and 639mm in height. Even without these outer structures, the internal chassis itself still measures 579 by 260 by 582 mm, making it one of the larger full-tower cases available today. The extra width is especially beneficial for cable management, as the case provides about 53mm of space behind the motherboard tray for routing cables. This should make it relatively easy to hide even the thickest power supply cables or complex custom wiring setups. The large internal volume also allows support for very large cooling configurations, including multiple radiators and oversized components. In fact, the case supports graphics cards up to 400 mm long and CPU coolers up to 186 mm tall, which should accommodate nearly any hardware currently available on the market.
All of this size and structural reinforcement naturally comes with some weight. As a full-tower chassis with a heavy frame and large tempered glass panel, the COSMOS ALPHA is not a lightweight case and is certainly not designed to be moved frequently. Fortunately, the integrated handles on the frame make it easier to lift when necessary. Still, those looking for a compact or portable system may want to consider a smaller chassis instead.
Looking at the top of the Cooler Master COSMOS ALPHA, we can see that the design continues the same futuristic styling found throughout the chassis. The central portion of the top panel is covered by a large perforated steel mesh, which serves as the primary ventilation area for the top-mounted cooling components. The mesh gradually narrows toward the front of the case, following the curved contour of the chassis and giving the overall design a more refined appearance. Surrounding this mesh panel are the distinctive silver structural bars that form part of the COSMOS series’ signature exoskeleton frame. These bars are not merely decorative, they also function as sturdy handles that make it easier to move such a large and heavy case when necessary.
Located near the front edge of the top panel is the front I/O section. Here, Cooler Master provides a generous selection of connectivity options, including four USB 3.2 Gen 1 Type-A ports and two USB 3.2 Gen 2x2 Type-C ports, along with a single 3.5 mm headset jack for combined audio and microphone use. The I/O panel is neatly integrated into the mesh surface, maintaining the clean look of the top panel while still remaining easily accessible when the case is placed under a desk. On either side of this section are the main control buttons, including the power button and additional function buttons for lighting or system control. Overall, the layout feels intuitive and well thought out, allowing users to easily access all ports and controls without disrupting the sleek appearance of the chassis.
The front panel of the Cooler Master COSMOS ALPHA continues the bold and distinctive styling that defines the entire chassis. Dominating the front is a large mesh intake area with a hexagonal pattern, designed to maximize airflow while still maintaining structural rigidity. The mesh sits slightly recessed within the surrounding frame, giving the front panel a layered appearance and adding visual depth to the design. On both sides of the mesh intake, the curved exterior frame pieces keep the recognizable COSMOS signature exoskeleton look. These silver structural elements are not only decorative, but also contribute to the rigidity of the chassis, while visually tying together the top and bottom handles of the case.
Behind the front mesh, the case comes preinstalled with two massive 200mm fans, which are responsible for pulling cool air directly into the system. Given the large surface area of the mesh and the size of the fans, airflow should be plentiful even for high-performance systems equipped with powerful graphics cards and multiple radiators. The mesh itself also acts as the primary dust filtration layer for the front intake, helping to keep dust from entering the chassis while still allowing a generous amount of air to pass through. Overall, the front panel design of the COSMOS ALPHA strikes a balance between aggressive aesthetics and practical cooling performance, reinforcing its position as a premium full-tower case built for high-end enthusiast systems.
The rear of the Cooler Master COSMOS ALPHA takes a noticeably different approach compared to most conventional tower cases. Typically, the back of a PC chassis exposes several functional components, such as the rear exhaust fan, motherboard I/O cutout, expansion slots, and power supply opening. However, Cooler Master has chosen to conceal almost the entire rear section behind a large removable plastic mesh panel. This panel covers the functional elements of the rear layout and gives the case a much cleaner and more unified exterior appearance. The mesh panel itself is easy to remove, as it is attached using magnets rather than screws or clips. With a gentle pull, the panel detaches to reveal the standard rear layout hidden underneath. Behind this cover, users will find the usual components expected on a full-tower chassis, including the motherboard I/O backplate area, expansion card slots, and the rear exhaust fan.
The included rear fan helps remove warm air from inside the case, although it remains completely hidden when the mesh panel is installed. This design choice emphasizes aesthetics while still maintaining good airflow through the ventilated mesh surface. Instead of exposing the internal hardware openings directly, the rear panel integrates them into a cohesive outer shell that matches the futuristic styling seen throughout the COSMOS ALPHA. While it deviates from the traditional open-back layout found on most cases, the removable magnetic panel makes maintenance and access straightforward without requiring tools.
Turning the Cooler Master COSMOS ALPHA upside down reveals that the bottom of the chassis follows the same bold structural design language seen throughout the rest of the case. Instead of traditional small case feet, the COSMOS ALPHA uses two large structural stands that form part of the exterior frame. These stands lift the chassis about 3cm above the resting surface, allowing plenty of clearance for airflow into the bottom ventilation area. Considering the overall size and weight of this full-tower case, these wide stands provide excellent stability and help distribute the weight evenly across the surface.
To prevent the case from sliding and to protect your desk or floor, long rubber strips are attached to the underside of both stands. Between the two stands sits the large bottom ventilation grille, which is protected by a removable mesh dust filter. The filter is reinforced with a rigid plastic frame, ensuring it remains sturdy while still being easy to remove for cleaning. This bottom intake area supports additional cooling options, including multiple fans or large radiators, depending on the user’s configuration. Also visible from this angle are two long ARGB lighting bars integrated into the bottom structure of the case. These lighting strips run parallel to the frame and help illuminate the underside of the chassis, creating a subtle glow effect when the system is powered on.
Overall, the bottom design of the COSMOS ALPHA not only ensures proper airflow and dust protection, but also contributes to the case’s distinctive aesthetic and premium build quality.
Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Installation and Conclusion
