CPU cooler ASUS ROG RYUJIN II 240

ASUS ROG RYUJIN II 240 is a water cooler for processors with a 240 mm radiator, aimed at more serious gaming and enthusiast configurations. The combination of two 120 mm fans and broad compatibility with CPU sockets gives you flexibility in choosing a platform – from AM4 and AM5 to LGA 1700 and even TR4. It is oriented towards people who want stable temperatures under load and controllable noise. If you are planning a build with a powerful CPU and long gaming or rendering sessions, this cooling solution is a very sensible step up from a standard air cooler.

What you get

You get a 240 mm radiator that provides more surface area for heat dissipation compared to smaller 120 mm solutions and allows for lower RPMs for the same cooling. The two 120 x 120 x 25 mm fans with PWM control operate in a range from 450 to 2000 RPM, allowing you to balance between silence in idle and more aggressive cooling under load. The airflow of up to 71.69 CFM and static pressure of 3.9 mm H2O help the radiator to be effectively ventilated, even in more compact cases with dense fins. The noise level of up to 29.7 dBA is good for a 240 mm water cooler – you can keep the system quiet under light load and increase the RPMs only when necessary. The 4-pin PWM connectors make management through the motherboard easy – you set the curves and let the software do the rest.

• Water cooling with a 240 mm radiator, which provides a larger area for heat dissipation compared to compact 120 mm AIO solutions.
• Two fans sized 120 x 120 x 25 mm, which provide a good balance between performance, compatibility with cases, and noise.
• PWM fans with a range of 450 ~ 2000 RPM +/- 10%, so you can adjust the cooling from nearly silent operation to maximum airflow under heavy load.
• Airflow of up to 71.69 CFM / 121.8 m³/h, allowing effective air passage through the radiator and stable CPU temperatures at higher frequencies.
• Maximum static pressure of 3.9 mm H2O, suitable for radiators with dense fins and more restrictive airflow in more compact cases.
• Noise level of up to 29.7 dBA, which is reasonable for a 240 mm water cooler and allows for a quiet system with properly set fan curves.
• Wide compatibility with CPU sockets LGA 2066, TR4, AM4, LGA 1200, LGA 2011-v3, LGA 2011, LGA 1700, AM5, LGA 1851, so you can use it with both older and current platforms.

Who it is suitable for

It is suitable for gamers and enthusiasts who want more serious cooling for a powerful CPU – for gaming at high frequencies, streaming, rendering, and other heavy tasks. If you are planning to overclock or simply want lower temperatures and a quieter mode compared to a stock cooler, a 240 mm AIO like this is a logical step. It is not the most budget-friendly option for a completely basic office build, but for more expensive configurations, it provides the necessary headroom.

The most sensible aspect here is the combination of a 240 mm radiator, strong PWM fans, and wide socket compatibility – you install it, set the curves, and forget about the CPU temperatures for a long time.