ReviewsCoolersASUS ROG Ryuo 240 CPU Liquid Cooler Review

ASUS ROG Ryuo 240 CPU Liquid Cooler Review

In this ASUS ROG Ryuo 240 review, we will walk you through the cooler's unboxing experience, installation, and testing.

Worth the big bucks?

Review Summary

The ASUS ROG Ryuo 240 is their enthusiast-grade CPU liquid cooler which retains all the bells and whistles of their flagship Ryujin segment but provides that package in an affordable manner, though it is still expensive. This cooler features the industry’s first embedded 1.77” all-colors OLED display screen on the block and packs addressable RGB lighting in addition to create some stunning lighting effects. The ROG Ryuo Model 12 fans complement the overall bold looks of the unit and pack quite a performance punch. The thermal performance of this cooler is marginally better as compared to the other 240mm AIOs tested so far on my test bench. I love everything about this cooler but the price!

Overall
8.3/10
8.3/10
  • Thermal Performance - 9.5/10
    9.5/10
  • Acoustic Performance - 7.5/10
    7.5/10
  • Build Quality - 9/10
    9/10
  • Features - 9.5/10
    9.5/10
  • Value - 6/10
    6/10

Pros

  • Performance
  • Aura Sync Lighting
  • Easy-to-use LiveDash software
  • Full-color LiveDash display

Cons

  • No protective plating under mounting holes
  • Challenging cable management
  • Inconvenient micro USB port location

When it comes to PC Components, AsusTek is among one the best names we have in the market. It was founded in 1989 in Taiwan. Ever since its foundation, ASUS has seen phenomenal growth and diversity in its business line. When it comes to ASUS, the first associated name that comes to mind is ROG or Republic of Gamers. ROG brand was introduced in 2006, and it focuses on mainstream gamers/enthusiasts with products ranging from Motherboard, Graphics Cards to Peripherals.

ASUS has sent us their ROG Ryujin and Ryuo CPU Coolers for review, and man, I am not thrilled for them! Indeed I was, and that is I made a request to ASUS for the review samples at the earliest to give these bad boys a spin and see that hold for the enthusiasts/gamers. Today, I will be taking a look at ASUS ROG Ryuo 240 CPU Liquid Cooler. I have already reviewed the ASUS Rog Ryujin 360, be sure to check it out!

ASUS has partnered with Asetek fruiting their idea of seeding the CPU cooling. What is this naming all about? Well, RYUO is a dragon king in Japanese mythology that symbolizes the power of the ocean and is known as a water deity associated with rainfall and winds. Ryou maintains the weather balance and bestows safety to the people in its region. Ryuo is the first cooler from the ROG brand with a reliable foundation and unique enhancements like Aura Sync lighting and a full-color LiveDash OLED; this liquid cooler brings ROG engineering to a vital part of your PC.

This segment has two variants at the moment; 120mm and 240mm. I will be testing the 240mm version. This cooler features ASUS ROG Ryuo fan model 12, designed specifically for radiators with airflow of up to 81 CFM at 5.0 mmH2O static pressure while spinning at 2500 RPM. Specs on paper seem rather powerful. I am not sure about the OEM of the fans as not much information is available about these fans yet.

At the core of the cooling is the Asetek 6th generation pump harnessing the cooling potential of the ASUS ROG Coolers with the splendid mix of the 1.77” full-color OLED display, which is embedded on the top of the block. The housing of the block is made of aluminum and looks that good in person. This is not all, as the block also features addressable RGB lighting near its bottom that really adds to the look. And as expected, this lighting is fully compatible with the AURA Sync lighting.

ASUS has provided a simple yet robust software called LiveDash to control and customize the output on the OLED display. The user can set it to display the frequency and temperature voltage of the CPU. The user can also set it to display an animation on the screen or a pre-defined set of images and banners. As long as the resolution size is 160×128 pixels, with less than 1 MB size in JPEG and GIF, the opportunities are endless. This cooler is compatible with Intel LGA 115x, 1366, 20xx, and AMD’s AM4 and TR4. Please, note that you would need to buy a kit for the TR4. ASUS is offering 3 years of warranty on these coolers.

Specifications

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Specs
Specs

Packaging and Unboxing

The cooler is shipped in a standard ROG-styling packing box made of cardboard. The front side has a black color background with the ASUS Republic of Gamers brand logo and name printed in the red color on the top left. ROG RYUO 240 is printed in silver color. There is a picture of the unit showing the RGB lighting and OLED display on the block. ASUS AURA Sync compatible info label is printed at the bottom right.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Packaging
Packaging (Image By Tech4Gamers)

The backside of the box has the ASUS ROG brand name and logo printed on the top left in red color, followed by silver color printing of the ROG RYUO 240. There are four pictures of the unit highlighting the special features of the cooler. Specifications are printed below the pictures. Compliance labels for the various regulations are printed at the bottom.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The backside of the box
The backside of the box (Image By Tech4Gamers)

Opening the box will show standard ROG styling inside on the underside of the top cover. There is an ASUS ROG brand name and logo printed in the center. The egged carton can be seen, which adds rigidity and further protection to the contents.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Unboxing the cooler
Unboxing the cooler (Image By Tech4Gamers)

Contents

The following are included:

  • 1x Radiator
  • 2x 120mm ASUS ROG RYUO Fan Model 12 fans
  • 1x Intel Backplate
  • 1x Intel Mounting Bracket
  • 1x AMD Mounting Bracket
  • 4x Thumbscrew caps
  • 16x Washers
  • 8x UNC 6-32x30mm Fan Screws
  • 4x Intel LGA 115x/1366 Standoffs
  • 4x Intel LGA 20xx Standoffs
  • 4x AM4 Standoffs
  • 16x UNC 6-32x8mm Radiator Screws
  • 1x Micro USB cable
  • User Manual
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Box Contents
Box Contents

Closer Look

Asus has made an entry into the paraphernalia of the PC components with the launch of their ROG CPU Coolers named RYUJIN and RYUO, followed by the Thor PSU and Chassis. They have expanded further into the ROG ecosystem, which may have roots in the industry norm at the moment; nevertheless, it is a pleasing moment for ROG lovers. They seemed to have come out of mainly focusing on the graphics cards and the motherboards, which are highly popular for their functionality and styling.

Maybe for ROG users, the price is of secondary concern, and if that is not the case, then the prices of these coolers may surprise and shock them. Coming back to the main objective of this content, here is what ASUS is saying about the RYUO coolers, “ROG Ryuo is a series of high-performance CPU liquid coolers designed for compact and mid-sized gaming builds. As the first CPU coolers from ROG, the Ryuo series brings the performance, features, and design details you expect from ROG to a vital part of your gaming system.

Featuring an embedded 1.77-inch LiveDash color OLED display that enables monitoring of real-time system stats as well as displaying personalized images or animation, ROG Ryuo lets you ensure your system both runs and looks its best. Together with Aura Sync support for harmonized RGB lighting effects, ROG Ryuo coolers deliver stunning aesthetics along with game-changing performance.”

Radiator

It is time to look into the design of this cooler, followed by our testing to see what it offers to the users. The dimension of the radiator is 272x121x27mm, where 27mm is the thickness or height of the radiator. It is a slim radiator. With 25mm fans, the total height would be 52mm. The total thickness of the unit when assembled was 54.56mm, as reported by my digital caliper. This is due to the thick heads of the fan screws.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The radiator
The radiator (Image By Tech4Gamers)

The radiator is made of aluminum; hence it is lightweight. The FPI count is 20 on this radiator, and fans with high airflow and air pressure make sense here. There are 13 channels in the radiator. The edges of the radiator are angular. The far chamber is relatively thinner, which is what we see on almost all AIO coolers. There is 105mm of spacing between any two mounting holes on the radiator housing. The total length of the fins area is approximately 240 mm. The depth of the radiator is 121mm. The total thickness of the fin stack is roughly 24.16mm approximately.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The frame of the radiator
The frame of the radiator  (Image By Tech4Gamers)
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Tubes connection on the radiator
Tubes connection on the radiator (Image By Tech4Gamers)

There is no protective plating under the mounting holes on this radiator, so take care while installing the fans on it as long screws could easily damage the fins that would least impact the performance or worst leakage from the radiator. There is a sticker pasted on the tubes chamber showing the serial number. The far chamber has a sticker pasted on it as well which is standard in all the AIO where Asetek is the OEM.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Rubber tubing
Rubber tubing (Image By Tech4Gamers)

This cooler uses flexible rubber tubing with sleeves on it for better aesthetics. The length of the tube is 380mm. The tubes have an OD of 10.82mm, as measured with a digital caliper.

Water Block

Let’s take a look at the main showcase of this cooler which is the CPU block. The ROG Ryuo is equipped with the latest cooling-plate design featuring micro-channels that provide more thermal dissipation area for processor heat. This innovative feature reduces thermal resistance for more efficient performance and cooler temps, much thanks to the 6th generation of Asetek pumps with ASUS customized PCB for added functionality.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Water block
Water block (Image By Tech4Gamers)
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Thermal Resistance
Thermal Resistance

The pump housing is made of aluminum and measures 80x80x45mm. It is finished in a black color tone, and it looks damn impressive in person. The housing is in a circular design. Looking at the back side of the housing, we can see the 90° barb fittings with both tubes at the same level.  Tubes can be rotated easily as per the requirement. There are three flat cables coming out from the backside, sandwiched between the fittings.

  • 1x SATA cable measuring 310mm approximately
  • 1x 4-pin connector cable measuring 296mm approximately
  • 1x Y-Splitter cable measuring 276+50mm approximately
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — 90° barb fittings
90° barb fittings (Image By Tech4Gamers)
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Water block cables
Water block cables (Image By Tech4Gamers)

This does add to the overall cable management challenge, and if the user is not good at it, the bulk of cables could ruin the impressive OLED display and RGB lighting.

The top side of the block has NCVM coating, and this is where most of the magic is coming from. It features the industry’s first-ever embedded all-colors 1.77” OLED display which can display almost anything as long as the requirements of 160×128 pixels in JPEG/GIF and less than 1MB size are met. ASUS has provided a comprehensive software called LiveDash to control the OLED Display, and it has been optimized for ASUS motherboards for hardware monitoring like CPU frequency, temperature, voltage, fan speeds, etc.

The user has the option of flipping the display 180°, so there is no need to worry about deciding upon the layout of the block when installing. The top edges of the housing have Republic of Gamers text printed on opposite sides facing each other in the white color. The right side of the block is a plain surface without any branding or printing. While you are thinking I am done with the block, it is far from that.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — A micro USB port on the left side of the block
A micro USB port on the left side of the block  (Image By Tech4Gamers)
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Another view of the water block
Another view of the water block (Image By Tech4Gamers)

The left side of the block has a micro USB port which is more inset into the housing. It is located near the rear side. My only complaint with this design is that there is more depth to access the port. Connecting the bundled micro USB cable after installing the block may be problematic. If you are thinking, no biggy, I will install the micro USB cable before installing the block; it simply is not possible, as the large bulkhead of the cable will obstruct the mounting corner of the block. Just take your time with it. In total, we have 4 cables to deal with this block. Giving you a heads-up just in case!

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The top chamber of the water block
The top chamber of the water block (Image By Tech4Gamers)

The top chamber of the block has a height of 19mm. The lower chamber has more width to it. The intersection point of these chambers has another magic show completely hidden from the eyes unless it is powered on. This intersection has an addressable RGB LED strip which lights when the unit is connected to the PSU using the SATA cable. This lighting creates a dope effect on the surrounding areas of the CPU socket.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The base of the water block
The base of the water block (Image By Tech4Gamers)

Now that we have taken a look at the block, it is time to take a peek at the bottom. We have a 54mm diameter circular base made of copper, and it comes with pre-applied thermal paste. It seems like Asetek has upped their game in the thermal paste as I have tested the cooler with stock paste and the Noctua NT-H1, and the performance difference is not much by any means.

Intel mounting bracket comes pre-installed. It can easily be taken off to install an AMD mounting bracket. Unfortunately, I could not get much information about the pump, but it is rated at 12VDC using 3.9W, giving us a hint on the current rating of 0.325Amps. The maximum RPM on the pump, as reported in the BIOS, was 2780 RPM, and I have found it to be silent, even running at full speed.

Fans

It is time to take a look at ASUS ROG Ryuo Model 12 fans. These are the custom fans introduced with their RYUO coolers, and they totally symbolize the ROG concept. First, let’s take a look at their specifications:

Variable Value
Dimension (mm) 125x125x25
Speed (RPM) 2500 ± 10%
Static Pressure (mmH2O) 5.0 at 12V
Air Flow (CFM) 80.95
Noise 37.6 dB(A)
Control 4-pin PWM
Voltage (VDC) 12
Current (Amp) 0.58
Power (W) 6.96
Cable Length (mm) 316 (approx)

 

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The fan
The fan (Image By Tech4Gamers)

The fan has a black color plastic frame with 7 impellers designed to cater to high-resistance surfaces. The static pressure rating of the fan is a clear indicator of it. The center has a reflective ROG eye sticker pasted on it. The diameter of the center hub is approximately 40mm. There is no anti-vibration pad on any mounting corner, which should have been included in this premium price.

Republic of Gamers is embossed on the inner slop frame near to one mounting corner. The frame has an inward slope on each mounting corner. The surface of mounting corners is raised as compared to the overall frame’s height. The raised surface has such a design that it is not raised across the complete length of the corner, which makes it difficult to use any anti-vibration pads. There is a spacing of 105mm between any two mounting holes. Though it is a plastic frame, its finish gives the impression of brushed aluminum.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The backside of the fan
The backside of the fan  (Image By Tech4Gamers)
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — The frame of the fan
The frame of the fan (Image By Tech4Gamers)

The backside of the fan has 4-arm assembly with one arm having more width and inset to provide for the cable route. There is a sticker pasted on the center with ROG eye printed in the white color at the top. ROG RYUO FAN MODEL 12 is printed under the ROG eye. The fan is made in China. Each mounting corner has a mounting hole side sandwiched between two recessed surfaces. The cable is flat to my liking. These fans are not RGB if you are looking for this information.

I was unable to gather critical information, which is the MTBF/MTTF of these fans. According to ASUS, the RYUO Fan model 12 provides 12% more airflow and 7% more static pressure as compared to other AIOs. There are no arrow indicators on any side to show the direction of the blade spin and airflow. These fans are drawing much higher power. I would not recommend using these two fans on a single fan header as most of the fan headers on the motherboard are rated at 1A at 12VDC. These two fans will draw 1.16A when combined using a y splitter. I have tested these fans on a HiAmp fan header rated at 3A.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Fan cable
Fan cable (Image By Tech4Gamers)

OLED Display and RGB Lighting

Before moving on to the installation and testing sections, let’s take a look at the Vortex software to control the OLED display and AURA Sync lighting on this cooler. All ASUS ROG coolers are AURA Sync compatible, which helps the users to synchronize their complete lighting solution based on ASUS hardware. AURA SDK is also available for other manufacturers and developers.

Livedash can be downloaded from the ASUS website, and they work with the ASUS ROG coolers. This software has a simplified interface, which is appreciated, and provides the users with the options to show hardware monitoring stats (only for ASUS motherboards), animations, logos, pictures, texts, banners, you name it.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — LiveDash Software
LiveDash – Hardware Monitor (Image By Tech4Gamers)

The main interface will show the Hardware Monitor as the default menu. The interface has ROG eye printed on the top left side. There is an option to turn the OLED display off/on. There is an option to rotate the display 180° under the OLED display. I really appreciate the ASUS design team taking care of this minute detail, as it will free the users from the orientation of the block while installing it. Also, as I have tested the cooler on the PrimoChill Praxis WetBench, which is an open-air test bench chassis, this feature came in handy when I was monitoring the hardware stats while sitting in my chair.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Monitoring the fans
Monitoring the fans (Image By Tech4Gamers)

Please, note that you would need AiSuite to control and monitor the fans connected to the cooler. AiSuite can be downloaded from the ASUS website. Under the Fan Xpert, the ROG RYUON option will appear, showing the custom fan curve, which the user can set as per the requirement. Please, note that this is optional and is only needed if you are connecting both fans to the Y-Splitter cable coming from the block. 

I did not use the AiSuite software for monitoring the temperatures as it is not a standard thermal monitoring software on my test bench. It was only used to check and control the speed of the fans and to show our readers about it. Please, read the testing methodology for a better understanding of our testing scheme.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — LiveDash - Image or Animation
LiveDash – Image or Animation (Image By Tech4Gamers)

Next, the menu is Image or Animation. The user can use this menu to display any image or animation on the OLED screen as long as the following requirements are met:

  • The resolution of the image is 160×128 pixels.
  • The type of the image is JPEG/GIF.
  • The size of the image is limited to a maximum of 1MB.

Click on Custom Image/animation option to enable the Browse button. Browse and select the desired image and click on the Apply button at the bottom to get it displayed on the screen. Else, the user can use the predefined logos and animation available in the list at the bottom for the display. Red ROG eye is my personal favorite.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — LiveDash - Custom Banner
LiveDash – Custom Banner (Image By Tech4Gamers)

Next, the menu is Custom Banner. Here ASUS has provided three predefined templates for the image. The user can type the text in the text box located at the bottom, and clicking on the Apply button will load the custom banner on the screen.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — LiveDash - Lighting Control
LiveDash – Lighting Control (Image By Tech4Gamers)

Next is the lighting control. 6 Modes are available for the addressable RGB lighting on these coolers. These are:

  • Static
  • Breathing
  • Strobing
  • Rainbow
  • Color Cycle
  • Flash and Dash

The user can set the direction of the lighting flow as well as control the speed of the dynamic effects. There is one caveat to it. Selecting any lighting mode will change the lighting mode of the ASUS motherboard as well, and if you would want to select different lighting on the motherboard than the one on the cooler, then AURA Sync software for the motherboard needs to be used for this purpose. This would make the total no of software needed to be 3, which in my opinion, is cumbersome, and Livedash should have all the options in it for the user’s convenience.

The lighting effects are right on the money, and I love the colors. It is not overly done and has even lighting for smooth and better visuals. The OLED display is something out of this world on this cooler, as we have yet to see such an option on any cooler. It is brilliantly done!

Installation

Here are the Installation guides for the Intel LGA-20XX and 115X sockets:

LGA-20XX

  • Install the LGA-20XX standoff screws on the mounting holes around the CPU Socket.
  • Install the fans on the radiator using the supplied fan screws and washers.
  • Place the water block on the CPU by aligning the mounting holes on the mounting bracket with the LGA 20XX standoff screws.
  • Secure the block using the thumbscrew caps. Use a screwdriver for this job and go diagonally for even pressure.
  • Connect the 4-pin PWM cable to the CPU fan header or any of your desired fan headers.
  • Connect the SATA connector to the PSU.
  • Connect the fan’s power cables to the Y-Splitter cable coming from the block or use a Y-Splitter of your own and connect them to your desired fan header on the motherboard.
  • This would complete the installation.

LGA-115X

  • Set the pushpins on the Intel backplate according to the socket. Slide them down for the Intel LGA-115X.
  • Place the backplate on the backside of the motherboard by aligning the push pins with the pre-drilled holes around the CPU socket.
  • Use the Intel LGA1115X/1366 standoff screws and secure the backplate with the motherboard. There will be a flex in the backplate giving the impression that it is not mounted correctly. Ignore that it will be secured once the block is installed.
  • Place the water block on the CPU by aligning the mounting holes on the bracket with the standoff screws.
  • Secure the block using the thumbscrew caps. Use a screwdriver for this job and go diagonally for even pressure.
  • Connect the 4-pin PWM cable to the CPU fan header or any of your desired fan headers.
  • Connect the SATA connector to the PSU.
  • Connect the fan’s power cables to the Y-Splitter cable coming from the block or use a Y-Splitter of your own and connect them to your desired fan header on the motherboard.
  • This would complete the installation.
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Mounting bracket installed
Mounting bracket installed (Image By Tech4Gamers)
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Water block installed
Water block installed (Image By Tech4Gamers)

Clearance and Installation Notes

The best thing about AIOs is the maximum clearance and compatibility with respect to the chassis, DIMM slots, and PCIe slots. This cooler has no such clearance issue. The tubes are not blocking any DIMM slot, and RAM modules of any height can be used. Similarly, the block is not obstructing the first PCIe x16 3.0 slot. Make sure that the chassis has provision for a 240mm radiator mounting, and you are good to go.

Testing and Methodology

Since this is the first time with the ASUS ROG fans, I decided to measure their unrestricted airflow using the PerfectPrime WD9819 Anemometer. Since it is the summer season here, I will not be testing the acoustical performance of these fans due to certain uncontrollable environmental noises. These will be subjective based on my experience with testing various fans and coolers thus far. Let’s start with the airflow testing.

Airflow

The airflow rating of these fans is 80.95 CFM, and my testing has shown the measured maximum airflow of 87 CFM, validating the airflow rating of the ASUS ROG RYUO Model 12 fans.

PWM Range

The Reeven Polariz RFC-04 fan controller was used to regulate the speed of the fans. Surprisingly, I could not take these fans down the 1200 RPM, making that to be their lower limit. This is something I was not expecting, as this reading was coming when the fan controller was at 5V. The maximum speed reading was 2490 RPM which is well within the 2500 ± 10% error margin (0.4% to be exact). Both fans reached the same speed.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Speed Range and Airflow
Speed Range and Airflow (Image By Tech4Gamers)

Thermal Testing

The following test bench was used for testing this cooler: –

  • ASUS Rampage V Edition 10
  • Intel i7 6850k
  • Crucial Ballistics Elite 4x4GB @ 3000MHz
  • Nvidia GTX 1080 FE
  • Samsung 840 EVO 250GB SSD
  • Seagate Barracuda 2TB
  • Corsair AX1200i
  • PrimoChill Praxis WetBench

The following software were used for the testing and monitoring.

  • ASUS Real Bench v 2.44
  • Real Temp GT v 3.70

The thermal paste used on the test bench is the Noctua NT-H1 thermal paste. Since ASUS asked us to test the coolers using the stock paste, I have tested the cooler using the stock paste and then the Noctua NT-H1 thermal paste as well. The use of the same thermal paste for all coolers will ensure standardization and mitigate any performance benefit that may come from using the supplied thermal paste.

Delta temperatures are reported on the graphs. The cooler is tested on stock clocks, i.e., 3.6GHz, using a 1.136V manual VCore. The ASUS RealBench 2.44 is used to stress test the cooler’s performance. Each run of the test was of 60 minutes, followed by a minimum of 15 minutes of idle time to let the system cool down. The fans and pump were set to run at their 100% RPM. CPU is overclocked to 4.3GHz with 1.350V manual Vcore.

The max temps on each core are summed up and divided by the core count to give the average figure. Delta temperatures are calculated by subtracting the ambient temperature from the average temperature. The testing is done on an open-air bench system. Once inside the chassis, the temperatures are expected to rise and would largely depend upon the optimal airflow inside the chassis.

Let’s take a look at the results. On stock clocks, i.e., 3.6GHz at 1.13V, the chip was idling at 2.83°C using stock paste. Under the stress test, the cooler was doing a delta of 21.83°C on stock paste. Using the Noctua NT-H1, the underload temperature was 21.0°C, a marginal 0.83°C difference from the stock paste. It is clear the stock paste is that good to give you better thermal performance. This cooler has definitely taken a top slot even on a stock paste but with a different range of 1°C – 2.29°C. ASUS clearly means business with these coolers.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Thermal Performance at 3.6 GHz
Thermal Performance at 3.6 GHz (Image By Tech4Gamers)

With overclocked chip at 4.3GHz using 1.350V, the chip was doing 40°C under load using stock thermal paste. With Noctua NT-H1, it was doing 39°C. This again confirms that the stock paste is indeed good for better thermal performance. Using the stock paste, the thermal performance range is 1° to 1.5°C which could be bettered using the aftermarket stock pastes as all the other coolers were tested using the Noctua NT-H1 thermal paste.

ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Thermal Performance at 4.3 GHz
Thermal Performance at 4.3 GHz (Image By Tech4Gamers)

Acoustic Performance

I could not measure the sound level of the unit due to certain environmental noises that would invalidate the actual sound level reading from the sound meter. Based on my experience with the fans and coolers testing so far, these fans are noisy and definitely warrant a custom fan curve. I am the sort of guy who wants silent or near-silent operations, and these fans are not falling into this category.

Conclusion

Asus has partnered with Asetek to bring to fruition their new breed of All-In-One coolers. These coolers are using Asetek’s sixth-generation pumps with presumably ASUS-modified PCB for added functionality. The ASUS ROG Ryuo is the cooler targeted at enthusiasts, while their flagship cooler is Ryujin. 

The ROG Ryuo all-in-one (AIO) liquid cooler brings the performance benefits of the ROG Ryujin liquid cooler in a more affordable package. Its aluminum pump cover is an optimized shape for high airflow yet skips the Ryujin’s extra shell in favor of a more spartan and conventional look. Ideal for mid-size builds and smaller form factors, the ROG Ryuo features Aura Sync lighting and a full-color LiveDash display that strikes the right balance between purely cosmetic enhancement and functional system monitoring.

The dimension of the radiator is 272x121x27mm, where 27mm is the thickness or height of the radiator. It is a slim radiator. With 25mm fans, the total height would be 52mm. The total thickness of the unit when assembled was 54.56mm, as reported by my digital caliper. This is due to the thick heads of the fan screws. There is 105mm of spacing between any two mounting holes on the radiator housing. The total length of the fins area is approximately 240 mm. The depth of the radiator is 121mm.

The total thickness of the fin stack is roughly 24.16mm approximately. There is no protective plating under the mounting holes on this radiator, so take care while installing the fans on it as long screws could easily damage the fins that would least impact the performance or worst leakage from the radiator. ASUS is using the sleeved rubber tubing measuring 380mm with an OD of 10.82mm.

The ROG Ryuo is equipped with the latest cooling-plate design featuring micro-channels that provide more thermal dissipation area for processor heat. The pump housing is made of aluminum and measures 80x80x45mm. It is finished in a black color tone, and it looks damn impressive in person. The housing is in a circular design. The top side of the block has NCVM coating, and this is where most of the magic is coming from. It features the industry’s first-ever embedded all-colors 1.77” OLED display, which can display almost anything as long as the requirements of 160×128 pixels in JPEG/GIF and less than 1MB size are met.

Three cables are coming out of the block. These are all flat cables. One is a 310mm long SATA cable to power the OLED Display and addressable RGB LEDs. The second one is the pump’s power cable measuring 296mm, and the third is a y-splitter cable measuring 276+50mm to connect two fans on the radiator with the unit to be controlled using the software.

There is a micro USB port on the block which is located much inside the block, and it may cause inconvenience when installing the USB cable. Cable management using 4 cables is a challenging task. The block has a copper base with a 54mm diameter and comes with pre-applied thermal paste. Addressable RGB LEDs are located on the intersection point of the top chamber and the bottom chamber and create some stunning lighting effects.

ASUS has bundled ROG Ryuo Model 12 fans with the Ryuo coolers. These are the custom fans introduced with their RYUO coolers, and they totally symbolize the ROG concept from their design. The fan has a black color plastic frame with 7 impellers designed to cater to high-resistance surfaces. The center has a reflective ROG eye sticker pasted on it. The diameter of the center hub is approximately 40mm.

There is no anti-vibration pad on any mounting corner, which should have been included in this premium price. There is a spacing of 105mm between any two mounting holes. Though it is a plastic frame, its finish gives the impression of brushed aluminum. These fans are rated at 2500±0% RPM. Their static pressure rating is 5.0 mmH2O at 12VDC. The maximum airflow rating is 80.95 CFM. Sound pressure is rated at 37.6 dB(A). Their power rating is 0.58A, 6.96W at 12VDC.

During our testing of these fans, it was observed that they could not go below 1200 RPM. These fans are drawing higher power. Don’t use them on a single fan header, as most of the motherboards’ fan headers are rated at 1A, 12VDC. These fans would draw 1.16A when combined, which could damage the motherboard and these fans. I have tested these fans on a HiAmp header rated at 3A.

ASUS has provided an easy-to-use software called LiveDash to control the OLED Display and AURA lighting. The plus point of the design is that this is fully AURA Sync compatible and can be used to sync overall lighting zones on the ASUS motherboards and graphics cards. The requirement to out a display on the screen is to use an image/animation of 160×128 pixels with a maximum size of 1MB using the JPEG/GIF only extensions.

The LiveDash is optimized to display the hardware monitoring stats on the screen, like CPU temperature, voltage, speed, etc. This can only be done on the ASUS motherboards; keep that in mind. To control the fans’ speed, you would need to download and install the AiSuite software. This functionality is not available in LiveDash. As such, we are dealing here with three software which, to some or many, may sound cumbersome. The OLED screen display is a killer element of the design, and man, am I not loving it! It is absolutely fun, and addressable RGB lighting creates stunning effects around the CPU socket.

The thermal performance of this cooler is very good, and it has taken a sweet top slot even on the stock paste. The quality of the stock paste is definitely good, as there is only a 1°C difference between it and the Noctua NT-H1. On stock clocks and with overclocking, the cooler emerges as a winner though the margin of win is narrow on the higher clocks. Unfortunately, this performance is coming at the expense of noisy fans, for which I would suggest setting up a custom fan curve.

At around 1800-1900 RPM, the sound level was what I could bear, but above that, they were getting louder. ASUS is offering 3 years of limited warranty on these coolers, which is nice, though, in this price range, 5 years warranty should have been provided. Corsair’s new Hydro series coolers are also based on Asetek’s 6th generation pumps but are costing much less and come with 5 years of warranty. Of course, they lack the OLED Display, after all.

Price-wise, the ROG Ryuo 240 carries a premium price tag for a cooling solution whose main function is to cool the CPU though it is doing that in quite a style, many thanks to the OLED display and addressable RGB lighting. 

I am thankful to ASUS for giving me the opportunity to review their ROG Ryuo 240 CPU Liquid Cooler.
ASUS ROG Ryuo 240 CPU Liquid Cooler Review — Tech4Gamers Recommended Award

 
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Hayyan Serwer
Hayyan Serwer
Hayyan Serwer is a tech enthusiast, with a love for PC building and article writing. Hayyan specializes in writing about CPU coolers and RAM kits. Hayyan has been familiar with the tech industry for over half a decade now, and has now stepped into providing quality reviews for the latest and greatest tech.

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