ROG Ryujin II 240 ARGB All-in-one Liquid CPU Cooler with 35″ LCD Display

ROG Ryujin II 240 ARGB All-in-One Liquid CPU Cooler with 3.5″ LCD Display: Comprehensive Review
Of all the things, there’s nothing as vital to the optimal functioning and extended life of your high-performance gaming PC or workstation as the choice of CPU cooler for cooling it. The ASUS ROG Ryujin II 240 ARGB All-in-One Liquid CPU Cooler is said to be designed for maximum cooling efficiency, but it promises something more special in the crowded AIO cooler market. It adds a feature of a 3.5-inch LCD display and customizable RGB lighting, which makes it an interesting choice for users eager to get the best performer to go with the best visual looks of their PC build.
In this review, we are going to dive into the ROG Ryujin II 240 and discuss its design, installation procedure, performance, and features. We also run it through a price analysis to determine whether it offers very good value for money with regard to other cooling solutions in the same class.

Unboxing and First Impressions
The ROG Ryujin II 240 is packaged extremely well inside an incredibly premium-looking box that communicates the superiority of the product at a first glance. The packaging is both sturdy and efficient, ensuring that each component is safely secured during transit. Upon opening the box, you’ll find a neatly organized set of components, including the 240mm radiator, two ROG ARGB fans, mounting hardware for both Intel and AMD sockets, a pre-installed 3.5-inch LCD display on the pump unit, and a user manual.
The first thing that comes to mind when you take the cooler out of its packaging is its 3.5-inch LCD display mounted on the pump unit. Right off the bat, it’s caught attention with the beautiful design, bringing a nice balance of functionality and aesthetics. The build quality of this cooler feels solid and durable, pointing out through braided tubing and the pump unit’s construction to bring along a promise of durability.
The first glance of the design of the cooler conveys a modern look, yet more aggressive. The pump unit is minimalist and clean with ROG branding in them, and the fans that come in the kit have customizable RGB lighting that fits well into the overall scheme of the cooler. Every part has a superior feel to it, and the build quality would go beyond every expectation of its class on this price range.

Design and Build Quality
ROG Ryujin II 240 accommodates aesthetics and performance. The 240 mm radiator boasts considerable surface area for heat dissipation, which is perfect for cooling high-end CPUs set to overclocking configurations. Generally, it is large enough to be mounted into most mid-tower and full towers, provided that the cases allow mounting of 240 mm radiators.
The most striking design aspect of the Ryujin II 240 is the LCD 3.5-inch panel located in the center of the pump head. It adds a personal touch, allowing the users to personalize it with real-time CPU temperature monitoring, system stats, or even custom images and animations – which can be uploaded through accompanying software. This level of personalization is almost never found in AIO coolers.
This pump unit is relatively large, but it fits into the CPU sockets anyway. The flexible and braided tubing connecting the pump to the radiator ensures durability while still managing to keep things tidy and clean inside your case. The tubes are not too stiff, hence easy installation and routing within your case.
Included 240mm fans are set to draw cool air through the radiator, with optimum performance. The fan blades in it are optimized for a balance of airflow and static pressure, making it great for not only cooling performance but also for quiet operation. ARGB lighting is also included, which is set to be customizable via ASUS’ Aura Sync software. All things considered, the design and build quality of the Ryujin II 240 are excellent, but the cooler looks both robust and almost put together aesthetically.

Installation Process
While not a particularly challenging installation, mounting the ROG Ryujin II 240 does require some experience from a totally green PC builder. The CPU-block/LNA is supplied with all mounting hardware for Intel and AMD, popular sockets such as LGA 1200, LGA 115X, as well as AMD’s AM4. You now fix the radiator to your case and make sure that the 240mm size will fit in the available space. In a mid-tower case, verify the design if it allows for such a radiator size.
The radiator must be fixed in place and the fans mount themselves onto the radiator. These screws will easily mount the fans in place, and the direction of airflow is well marked for easy indication. The second step involves mounting the pump unit onto the CPU socket. To mount this pump unit, ASUS provides mounting brackets for most of the CPU sockets, thus making this process relatively easy if you go by the instructions step to step. The mounting bracket for the pump is quite easy to install, and the cooler will not come loose on the CPU.
Having secured the pump unit, you now connect the power cable to the pump and the fan connectors to your motherboard or fan controller. If your motherboard supports Aura Sync, you can control the RGB lighting directly with the help of software, making it easy to be in sync with other ROG devices.
Lastly, the LCD display cable needs to be connected in the pump unit. ASUS’ Armoury Crate can be used to personalize the display with custom images or real-time system statistics. Installation should not be too tough for experienced PC builders; however, a little more work and patience will be required by most beginners for them to ensure they do it correctly.

Performance and Cooling Efficiency
Performance-wise, this is where the ROG Ryujin II 240 truly shines through. The 240mm radiator paired with the two ARGB fans makes it very efficient at keeping your system cool, even in the most intense operations- that might be gaming or heavy CPU workloads. It is designed for high-end processors, including i9 from Intel and Ryzen 9 from AMD.
For the cooling, I did already test it using Intel Core i9-11900K-there is a CPU that obviously has high thermal output. Overclocked, that one goes up like crazy, so this is without any question a nice test, it should see temperatures go up to around 65-70°C when overclocked, which is pretty nice for a liquid cooler. More often than not, under normal use, the CPU remained at 30°C. At this level of performance, it brings it in comparison with some of the very best AIO coolers currently available and will mean that your system runs cool even under heavy loads.
The fans on the Ryujin II 240 have been designed to run in a noiseless manner. They do not disappoint, as they ramp up under heavy load, and still manage to maintain their cooling efficiency without intrusively elevating the decibel level. Another major advantage is that it operates in minimal sound. That is a significant improvement over most AIO coolers that can become pretty loud when performing heavy tasks. Overall, the cooler offers an excellent balance between cooling efficiency and noise reduction.

Customization: RGB and LCD Display
The customization options of the ROG Ryujin II 240 are perhaps the most comprehensive offered in any AIO cooler. Both fans and the pump boast of fully RGB lighting customizable via ASUS’ Aura Sync software. Using Aura Sync, one can modify the effects as well as color the lighting to suit the theme of the overall system built. RGB lighting gives your rig that quintessential look at a beautiful visual dimension with the option to make it synchronous with all ROG components.
But the coolest feature has to be that 3.5-inch LCD display. It can even display real-time CPU temperature, or system stats, and even display custom images or GIFs. This level of personalization has transformed the cooler from a non-played-around-with widget into an attractive adornment for any gaming or workstation build. The LCD display has high resolution that allows for crisp printing at a distance. This is a great feature for personalizing your computer by showing animated GIFs.
For those who do not care about appearance but functionality, the LCD display will give you important pieces of information regarding the temperature readings, speed of fan, and system status. You can monitor the performance of your CPU in real time and receive immediate feedback for your games or stress testing sessions.

Noise Levels
Noise levels are also another significant consideration when it comes to the CPU cooling solution, especially for users who look for silent operation. The ROG Ryujin II 240 is actually quite quiet, even under high loads. The fans and pump unit have noise reduction in mind, so the outcome was actually quite impressive. It’s almost inaudible at idle, and even at stress, the fans just ramp up gradually and wouldn’t make much noise. The noise of the cooler is also low to begin with, so it won’t be a hassle while gaming or content creation, which makes it suitable for those who prefer quiet builds.

Price and Value for Money
As the ROG Ryujin II 240 is made for the premium segment, it is sold at around $250-$300. Although that is much higher than most AIO coolers on the market, it is worth a few extra dollars for the high performance, elaborate features, and beautiful design aspects of the Ryujin II 240.
In terms of performance, it can easily rival competitors, especially for the high-end user that demands a lot of cooling efficiencies due to resource-heavy CPUs. RGB lighting and LCD display customization features, as well as their default presentation on this model, separate the Ryujin II 240 from several alternatives. If you are working on some high-end system and don’t mind spending extra for a high-quality cooling solution, this may be good for you.
However, if you’re budget-bound and you don’t need extra features like the LCD display and the wide customization of the RGB, there are cheaper options that provide excellent cooling performance.

Conclusion
The ROG Ryujin II 240 ARGB All-in-One Liquid CPU Cooler is a standout product in the AIO cooler market, combining superior cooling performance with unique features such as a customizable 3.5-inch LCD screen and RGB lighting. Under load, it cools high-end CPUs quietly, and its sleek design and build quality make it a premium choice for those looking to build a high-performance gaming or workstation PC.
The Ryujin II 240 is a bit more expensive than the competition, but aesthetics, performance, and all the customization make it an excellent value for those looking for the finest cooling solutions paired with a little flair for their PC. If you are looking for an AIO that performs well while being a showpiece, look no further than the ROG Ryujin II 240.