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Black rectangular water block with 3.5 inch LCD screen, two 120 mm ARGB fans on aluminium radiator, sleeved rubber tubes

ASUS

ASUS ROG RYUJIN II 240 ARGB liquid cooler

SKU CH-XRTS-QNEA0 MPN ROG RYUJIN II 240 ARGB

A 240 mm all-in-one liquid CPU cooler with a 3.5" colour LCD display, seventh-generation Asetek pump starting at 840 rpm, and dual 120 mm ARGB fans delivering 70.07 CFM at 36.45 dB(A)

  • TypeLiquid Cooling System
  • Block CompatibilityIntel LGA 20xx / 1700 / 1200 / 115x AMD Socket sTRX4 / TR4*
  • Block Dim.78.15 x 87.50 x 81.00 mm
  • Block MaterialCopper
  • Radiator Size272.00 x 121.00 x 27.00 mm
  • Radiator MaterialAluminum
  • Real-time system stats on a 3.5" colour LCD display
  • Seventh-gen Asetek pump operates from 840 rpm for quiet cooling
  • Dual 120 mm ARGB fans deliver 70.07 CFM airflow at 36.45 dB(A)
  • Copper cold plate with aluminium radiator (272 x 121 x 27 mm)
  • Supports Intel LGA 1700/1200/115x and AMD AM4/sTRX4/TR4 sockets

All-in-one liquid CPU cooler

The ASUS ROG RYUJIN II 240 ARGB is an all-in-one liquid cooler built for mainstream Intel and AMD sockets. It fits LGA 20xx, 1700, 1200, 115x and AMD sTRX4, TR4 and AM4 platforms. A bundled bracket covers TR4 and sTRX4 installations. The copper cold plate and aluminium radiator form a sealed loop with 380 mm sleeved rubber tubes.

Capacity and headroom

The 240 mm radiator uses two 120 mm fans spinning between 600 and 2200 RPM to move 70.07 CFM of air. The seventh-generation Asetek pump starts at 840 RPM to circulate coolant through the copper block. This combination handles typical enthusiast thermal loads while leaving headroom for moderate overclocking. Sustained heavy workloads will eventually saturate the radiator surface area.

Thermals noise and power

At full speed the fans reach 36.45 dB(A) while delivering rated airflow. The pump operates quietly at its minimum speed and scales with temperature. ARGB lighting and the 3.5 inch LCD display draw minimal power from the motherboard headers. Fan curves can be tuned via software to prioritise silence or maximum cooling.

Highlights

  • Real-time system stats on a 3.5" colour LCD display
  • Seventh-gen Asetek pump operates from 840 rpm for quiet cooling
  • Dual 120 mm ARGB fans deliver 70.07 CFM airflow at 36.45 dB(A)
  • Copper cold plate with aluminium radiator (272 x 121 x 27 mm)
  • Supports Intel LGA 1700/1200/115x and AMD AM4/sTRX4/TR4 sockets

Specifications

BrandASUS
ModelROG RYUJIN II 240 ARGB
TypeLiquid Cooling System
Block CompatibilityIntel LGA 20xx / 1700 / 1200 / 115x
AMD Socket sTRX4 / TR4* / AM4
* The mounting bracket is bundled with TR4/sTRX4 CPU Package.
Block Dim.78.15 x 87.50 x 81.00 mm
Block MaterialCopper
Radiator Size272.00 x 121.00 x 27.00 mm
Radiator MaterialAluminum
Fan Size2 Fan Slots (120 mm)
Fan Dim.120.00 x 120.00 x 25.00 mm
Fan RPM600-2200 RPM
Fan Air Flow70.07 CFM
Fan Noise36.45 dB(A)
LED ColorARGB
Tube Dim.380.00 mm
Tube MaterialSleeved Rubber tube
Features3.5" color LCD display for real-time system stats and personalized animations via ASUS LIVEDASH software controls
Seventh Gen Asetek pump delivers exceptional cooling and minimal noise with an operating range starting at 840 rpm
Quality ROG ARGB fans deliver high airflow and minimal noise
Extensive Compatibility: Compatible with both Intel and AMD mainstream sockets. LGA1700, LGA1200, AM4, TR4/sTRX4 and more
The patent-pending embedded micro fan inside the pump housing to maximize cooling performance on the VRM and M.2
Aura Sync addressable RGB lighting features a nearly endless spec
Shipping weight2.31 kg
Package size307 × 241 × 130 mm

Questions about this item

Will the ROG RYUJIN II 240 ARGB fit my LGA 1700 motherboard and existing 120 mm case fan mounts?

Yes, the water block supports Intel LGA 1700 and the 272 mm radiator uses two 120 mm fan slots matching standard case mounts.

How can I confirm the seventh-gen Asetek pump is running at its 840 rpm minimum after installation?

Monitor pump speed in ASUS LIVEDASH or your motherboard BIOS; the pump should report at or above 840 rpm when the system is idle.

Does the box include mounting hardware for AMD TR4/sTRX4 or must I buy a separate bracket?

The TR4/sTRX4 mounting bracket is bundled with the cooler, while Intel LGA 1700/1200/115x and AMD AM4 hardware is also included.

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