With the ASUS ROG Strix Helios II, ASUS is expanding its Republic of Gamers case series with a model that is clearly in the premium segment. Accordingly, the case is aimed at users who are prepared to dig a little deeper into their pockets for a high-quality overall package. In addition to extensive features, the build quality plays a key role, as materials such as aluminum, steel and tempered glass should not only give the Helios II a striking look, but also a correspondingly high-quality feel.
The case is also generous when it comes to hardware compatibility. Support for motherboards up to E-ATX, plenty of space for large graphics cards and extensive options for air and water cooling should ensure that the Helios II is suitable for both powerful gaming systems and elaborate custom builds. ASUS also installs several 140 mm fans ex works and integrates modern connections in the front panel, including fast USB-C.
In the following review, we take a closer look at the workmanship, features and practicality of the ASUS ROG Strix Helios II.
Technical details
| Model | ASUS ROG Strix Helios II |
| Case type | Mid-Tower |
| Case dimensions | 250 × 565 × 591 mm |
| Case weight | approx. 18 kg |
| Materials | Aluminum, steel, tempered glass |
| Mainboard support | E-ATX, ATX, Micro-ATX, Mini-ITX |
| Drive bays | 4 × 2.5″, 2 × 2.5″/3.5″ |
| Expansion slots | 8 horizontal + 2 vertical |
| Max. GPU length | 450 mm |
| Max. CPU cooler height | 190 mm |
| Max. PSU length | 220 mm |
| Pre-installed fans | 4 × 140 mm (3× front, 1× rear) |
| Radiator support | Front: up to 420 mm Top: up to 360 mm |
| Front I/O | 2 × USB 3.2 Gen 2×2 Type-C 4 × USB 3.2 Gen1 Type-A 1 × headset (3.5 mm) |
| Accessories / Hub | PWM fan hub (up to 6 fans) and ARGB hub |
| Special features | Dual tempered glass panels, GPU holder, dust filter, cable management |
| price | € 312.97 * |
Scope of delivery
The scope of delivery of the ASUS ROG Strix Helios II is generally tidy and organized according to the premium claim. All accessories are housed in a separate, black accessory box, which is neatly stowed in the case and leaves a high-quality impression as soon as it is unpacked.
Inside you will find the usual components such as screws and cable ties, supplemented by a bracket for vertical mounting of the graphics card. The individual parts are clearly arranged in different, albeit unlabelled, bags, which makes organization easier, but does not completely avoid a quick search for the right screws.
The enclosed operating instructions are a positive feature. It is in several languages and relies heavily on an illustrated presentation of the individual assembly steps. The focus is clearly on comprehensible illustrations, making it easy to follow the assembly process even without extensive text descriptions – an approach that suits both beginners and experienced system builders.
External impression
The class of the ASUS ROG Strix Helios II becomes clear from the very first contact. The combination of brushed aluminum, steel and large glass elements creates a high-quality overall impression, with the aluminum front in particular immediately catching the eye and giving the case a clear premium look.
With its dimensions of 250 × 565 × 591 mm, the Helios II has a correspondingly self-confident appearance. It is clearly not a compact case, but a model that deliberately shows presence and offers sufficient space for powerful hardware. This size also underlines its claim as a showcase platform for elaborate builds.
The design line fits seamlessly into the ROG Strix series. Logos and lettering are used discreetly but purposefully and ensure that the affiliation remains recognizable at all times without overloading the overall impression.
The front design is particularly characteristic. The brushed aluminum surfaces flow seamlessly into the striking air intakes, which are not only functional, but also emphasize the angular, independent design. Overall, this gives the housing a powerful appearance without losing any of its structure or clarity.
The two tempered glass side panels provide a special accent. The fact that not only the left but also the right side is glazed opens up additional possibilities for visibly staged builds and clearly sets the Helios II apart from many classic enclosures.
The lid is also cleverly designed. The I/O panel is located in the front area, while behind it is a large ventilation opening that supports the airflow. The whole thing is rounded off by the characteristic carrying strap, which not only stands out visually, but also offers practical added value in everyday use.
Interior impression
The high-quality first impression is continued in the interior of the ASUS ROG Strix Helios II. Materials, workmanship and accuracy of fit are at a consistently high level and underline the claim of a premium case. There are no sharp edges or unclean transitions to be seen – instead, the interior is cleanly finished and well thought out.
The main chamber is very spacious, as you would expect with this size of case. There is plenty of space for the latest high-end components, which makes installation convenient and at the same time leaves enough room for elaborate cooling concepts.
A total of four 140 mm fans are pre-installed ex works, three in the front and one in the rear. ASUS relies on comparatively thick 28 mm models here, which are designed for a high air flow rate. This means that the case already offers a solid basis for a powerful airflow without additional fans, which is particularly advantageous for hot hardware.
A central design element in the interior is the generous power supply cover. This is designed in two parts and combines function with appearance: while the left side offers a small viewing window, the right side features typical ROG elements. The upper side is largely perforated, allowing warm air to escape from the lower area. The whole thing is complemented by a rubberized cable aperture, which is especially well positioned for the GPU power supply.
Additional stability is provided by the integration of two GPU holders, which reliably support graphics cards of different lengths. This is a practical detail that offers real added value in everyday use, especially for heavy high-end models.
Less convincing, however, is the lack of support for so-called hidden connector mainboards. Especially in this price range, many users deliberately choose such boards in order to achieve a particularly tidy appearance – ASUS is wasting some potential here.
A look at the rear shows the second chamber, which is generously dimensioned and offers plenty of space for neat cable management. Around half of the area is covered by a hinged and removable plastic cover. Behind this is a combined PWM and RGB control board, which can be used to control the fan speed and lighting directly via the buttons on the front I/O, as well as mounting options for up to four SSDs. In addition, there are several predefined cable guides and mounting points to make cable routing much easier.
The power supply bay is largely closed on this side. The power supply unit is inserted from the rear in the classic way, while specifically placed openings allow the cables to be routed cleanly into the interior. A double SSD cage is also integrated, which offers additional flexibility when mounting drives.
Workmanship
The high-quality impression of the ASUS ROG Strix Helios II is also confirmed by a closer look at the workmanship. ASUS has delivered a case that is well thought out down to the last detail and impresses with numerous neatly implemented design and construction features.
The materials used leave a very high-quality impression throughout. In particular, the combination of aluminum, steel and tempered glass contributes significantly to the high-quality overall impression and clearly sets the case apart from cheaper models. Even with smaller elements such as covers, brackets or guide rails, it is clear that no expense has been spared here.
Overall, the Helios II has an extremely solid and stable design, which not only increases confidence in its longevity, but also ensures solid handling in everyday use. There are no rattling parts or yielding elements to be seen – instead, the housing conveys the feeling of being designed for long-term use in every respect.
Installation and assembly
Installing the hardware in the ASUS ROG Strix Helios II is very convenient overall and clearly benefits from the spacious interior. Thanks to the spacious main chamber, there is enough room to install components without cramped conditions. Even larger components such as E-ATX mainboards, expansive graphics cards or extensive water cooling systems can be integrated without fiddly handling, which makes the build noticeably easier.
The case is also well thought out in detail. Prepared cable guides, sufficient feed-throughs and sensibly positioned mounting points help to ensure that components can be installed in a structured manner. Elements such as the modular power supply cover, GPU brackets or the drive slots at the rear fit in well with the overall process and ensure a smooth process overall.
However, the cable management at the rear requires a little more attention. Although the second chamber basically offers plenty of space and numerous mounting options, the additional plastic cover sets certain limits to the available space. Depending on how structured the cabling is, it can be a little more challenging to accommodate all cables neatly and without pressure behind the cover. However, with a little planning and care, a decent result can be achieved here too.
Performance and practical test
The cooling performance of the ASUS ROG Strix Helios II is evaluated under conditions that are as close to real-life conditions as possible. In order to depict a realistic usage scenario, the fan and pump speeds were deliberately not set to maximum performance, but rather moderately. The idle temperatures were recorded directly after system startup, while Call of Duty: Black Ops 7 was used as the gaming scenario in the “Extreme” preset at UWQHD resolution. In addition, a synthetic load test with Prime95 was carried out over 30 minutes, with the fans set to 50% and the pump to 75%.
Test system in the ASUS ROG Helios II
Measured temperatures
| Scenario | CPU | GPU |
| Idle (after system start) | 39.8 °C | 43.2 °C |
| Gaming (BO7, UWQHD, Extreme) | 51.1 °C | 55.4 °C |
| Prime 95 CPU Stress Test | 63.5 °C | 48.7 °C |
Classification of the results
The measured temperatures paint a very consistent picture overall. Even in idle mode, the CPU and GPU are at a pleasantly low level, which indicates solid basic ventilation and constant air exchange in the casing.
In gaming mode under real load, the Helios II is also inconspicuous in a positive sense. Temperatures of around 50 to 55 °C for the CPU and GPU can be rated as very good in view of the restrained fan speeds and speak for an efficient airflow.
The CPU temperature rises as expected under continuous synthetic load through Prime95, but remains clearly in the non-critical range at around 63.5 °C. These conditions in particular show that the case offers sufficient thermal reserves without the need for aggressive fan profiles.
All in all, the ASUS ROG Strix Helios II delivers a convincing cooling performance that remains stable both in everyday use and under load and thus perfectly matches its claim to be a high-end case.
Conclusion
With the ASUS ROG Strix Helios II, ASUS delivers a case that convincingly proves its claim in the premium segment in many areas. The build quality, well thought-out design and choice of materials in particular leave a very positive impression and clearly set the model apart from classic standard cases. The interior of the Helios II is also spacious, modular and very user-friendly overall, which is ideal for both beginners and experienced system builders.
In practice, the case impresses above all with its strong cooling performance. Even with restrained fan settings, very good temperatures are achieved, which speaks for an efficient airflow concept and successful tuning of the pre-installed fans. At the same time, there is sufficient scope for more demanding setups, for example with custom water cooling or particularly powerful hardware.
Minor points of criticism can be found in the details. For example, the cable management on the rear may require a little more attention, especially in combination with the cover. The lack of support for hidden connector mainboards is also an aspect that doesn’t seem quite up to date in this class.
All in all, the Helios II is clearly aimed at users who are looking for a high-quality, visually striking and technically powerful case and are prepared to budget accordingly. Those who fit this profile will receive a well-rounded overall package with only a few weaknesses, which cuts a convincing figure both in everyday use and in showcase builds.
PROS
- Very high-quality workmanship and materials
- Strong airflow thanks to 4× 140 mm fans
- Spacious interior for high-end hardware
CONS
- No support for hidden connector mainboards
- Cable management on the rear is sometimes challenging
- Large and heavy – requires a lot of space
Conclusion
Very high-quality premium case with strong cooling performance and plenty of space for high-end hardware. Minor weaknesses in cable management and a lack of hidden connector support prevent the absolute top rating.
